mirror of
https://git.proxmox.com/git/grub2
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b53f595b3e
We don't use lgcc_s but missing lgcc_s or another library cause test to fail. So use -nostdlib. We need to use -Werror to avoid warning-generated case to be accepted. Clang uses -nopie rather than -no-pie. Check both and use whichever one works. Additionally android clang passes -pie to the linker even though it doesn't define __PIE__. So if compilation without no-pie logic fails add -nopie/-no-pie even if __PIE__ is not defined.
478 lines
13 KiB
Plaintext
478 lines
13 KiB
Plaintext
dnl Redefine AC_LANG_PROGRAM with a "-Wstrict-prototypes -Werror"-friendly
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dnl version. Patch submitted to bug-autoconf in 2009-09-16.
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m4_define([AC_LANG_PROGRAM(C)],
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[$1
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int
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main (void)
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{
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dnl Do *not* indent the following line: there may be CPP directives.
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dnl Don't move the `;' right after for the same reason.
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$2
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;
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return 0;
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}])
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dnl Check whether target compiler is working
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AC_DEFUN([grub_PROG_TARGET_CC],
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[AC_MSG_CHECKING([whether target compiler is working])
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AC_CACHE_VAL(grub_cv_prog_target_cc,
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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asm (".globl start; start:");
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void __main (void);
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void __main (void) {}
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int main (void);
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]], [[]])],
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[grub_cv_prog_target_cc=yes],
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[grub_cv_prog_target_cc=no])
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])
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AC_MSG_RESULT([$grub_cv_prog_target_cc])
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if test "x$grub_cv_prog_target_cc" = xno; then
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AC_MSG_ERROR([cannot compile for the target])
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fi
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])
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dnl grub_ASM_USCORE checks if C symbols get an underscore after
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dnl compiling to assembler.
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dnl Written by Pavel Roskin. Based on grub_ASM_EXT_C written by
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dnl Erich Boleyn and modified by Yoshinori K. Okuji.
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AC_DEFUN([grub_ASM_USCORE],
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[AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([AC_PROG_EGREP])
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AC_MSG_CHECKING([if C symbols get an underscore after compilation])
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AC_CACHE_VAL(grub_cv_asm_uscore,
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[cat > conftest.c <<\EOF
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int func (int *);
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int
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func (int *list)
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{
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*list = 0;
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return *list;
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}
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EOF
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if AC_TRY_COMMAND([${CC-cc} ${CFLAGS} -S conftest.c]) && test -s conftest.s; then
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true
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else
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AC_MSG_ERROR([${CC-cc} failed to produce assembly code])
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fi
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if $EGREP '(^|[^_[:alnum]])_func' conftest.s >/dev/null 2>&1; then
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HAVE_ASM_USCORE=1
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grub_cv_asm_uscore=yes
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else
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HAVE_ASM_USCORE=0
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grub_cv_asm_uscore=no
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fi
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rm -f conftest*])
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AC_MSG_RESULT([$grub_cv_asm_uscore])
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])
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dnl Some versions of `objcopy -O binary' vary their output depending
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dnl on the link address.
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AC_DEFUN([grub_PROG_OBJCOPY_ABSOLUTE],
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[AC_MSG_CHECKING([whether ${TARGET_OBJCOPY} works for absolute addresses])
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AC_CACHE_VAL(grub_cv_prog_objcopy_absolute,
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[cat > conftest.c <<\EOF
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void cmain (void);
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void
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cmain (void)
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{
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*((int *) 0x1000) = 2;
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}
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EOF
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if AC_TRY_EVAL(ac_compile) && test -s conftest.o; then :
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else
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AC_MSG_ERROR([${CC-cc} cannot compile C source code])
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fi
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grub_cv_prog_objcopy_absolute=yes
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for link_addr in 0x2000 0x8000 0x7C00; do
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if AC_TRY_COMMAND([${CC-cc} ${TARGET_CFLAGS} ${TARGET_LDFLAGS} -nostdlib ${TARGET_IMG_LDFLAGS_AC} ${TARGET_IMG_BASE_LDOPT},$link_addr conftest.o -o conftest.exec]); then :
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else
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AC_MSG_ERROR([${CC-cc} cannot link at address $link_addr])
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fi
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if AC_TRY_COMMAND([${TARGET_OBJCOPY-objcopy} --only-section=.text -O binary conftest.exec conftest]); then :
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else
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AC_MSG_ERROR([${TARGET_OBJCOPY-objcopy} cannot create binary files])
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fi
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if test ! -f conftest.old || AC_TRY_COMMAND([cmp -s conftest.old conftest]); then
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mv -f conftest conftest.old
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else
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grub_cv_prog_objcopy_absolute=no
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break
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fi
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done
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rm -f conftest*])
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AC_MSG_RESULT([$grub_cv_prog_objcopy_absolute])
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if test "x$grub_cv_prog_objcopy_absolute" = xno; then
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AC_MSG_ERROR([GRUB requires a working absolute objcopy; upgrade your binutils])
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fi
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])
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dnl Supply --build-id=none to ld if building modules.
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dnl This suppresses warnings from ld on some systems
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AC_DEFUN([grub_PROG_LD_BUILD_ID_NONE],
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[AC_MSG_CHECKING([whether linker accepts --build-id=none])
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AC_CACHE_VAL(grub_cv_prog_ld_build_id_none,
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[save_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -Wl,--build-id=none"
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
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[grub_cv_prog_ld_build_id_none=yes],
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[grub_cv_prog_ld_build_id_none=no])
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LDFLAGS="$save_LDFLAGS"
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])
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AC_MSG_RESULT([$grub_cv_prog_ld_build_id_none])
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if test "x$grub_cv_prog_ld_build_id_none" = xyes; then
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TARGET_LDFLAGS="$TARGET_LDFLAGS -Wl,--build-id=none"
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fi
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])
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dnl Check nm
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AC_DEFUN([grub_PROG_NM_WORKS],
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[AC_MSG_CHECKING([whether nm works])
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AC_CACHE_VAL(grub_cv_prog_nm_works,
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[
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nm_works_tmp_dir="$(mktemp -d "./confXXXXXX")"
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AC_LANG_CONFTEST([AC_LANG_PROGRAM([[]], [[]])])
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$TARGET_CC $TARGET_CFLAGS -c conftest.c -o "$nm_works_tmp_dir/ef"
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if $TARGET_NM "$nm_works_tmp_dir/ef" > /dev/null; then
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grub_cv_prog_nm_works=yes
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else
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grub_cv_prog_nm_minus_p=no
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fi
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rm "$nm_works_tmp_dir/ef"
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rmdir "$nm_works_tmp_dir"
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])
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AC_MSG_RESULT([$grub_cv_prog_nm_works])
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if test "x$grub_cv_prog_nm_works" != xyes; then
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AC_MSG_ERROR([nm does not work])
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fi
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])
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dnl Supply -P to nm
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AC_DEFUN([grub_PROG_NM_MINUS_P],
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[AC_MSG_CHECKING([whether nm accepts -P])
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AC_CACHE_VAL(grub_cv_prog_nm_minus_p,
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[
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nm_minus_p_tmp_dir="$(mktemp -d "./confXXXXXX")"
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AC_LANG_CONFTEST([AC_LANG_PROGRAM([[]], [[]])])
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$TARGET_CC $TARGET_CFLAGS -c conftest.c -o "$nm_minus_p_tmp_dir/ef"
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if $TARGET_NM -P "$nm_minus_p_tmp_dir/ef" 2>&1 > /dev/null; then
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grub_cv_prog_nm_minus_p=yes
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else
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grub_cv_prog_nm_minus_p=no
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fi
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rm "$nm_minus_p_tmp_dir/ef"
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rmdir "$nm_minus_p_tmp_dir"
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])
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AC_MSG_RESULT([$grub_cv_prog_nm_minus_p])
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if test "x$grub_cv_prog_nm_minus_p" = xyes; then
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TARGET_NMFLAGS_MINUS_P="-P"
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else
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TARGET_NMFLAGS_MINUS_P=
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fi
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])
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dnl Supply --defined-only to nm
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AC_DEFUN([grub_PROG_NM_DEFINED_ONLY],
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[AC_MSG_CHECKING([whether nm accepts --defined-only])
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AC_CACHE_VAL(grub_cv_prog_nm_defined_only,
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[
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nm_defined_only_tmp_dir="$(mktemp -d "./confXXXXXX")"
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AC_LANG_CONFTEST([AC_LANG_PROGRAM([[]], [[]])])
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$TARGET_CC $TARGET_CFLAGS -c conftest.c -o "$nm_defined_only_tmp_dir/ef"
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if $TARGET_NM --defined-only "$nm_defined_only_tmp_dir/ef" 2>&1 > /dev/null; then
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grub_cv_prog_nm_defined_only=yes
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else
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grub_cv_prog_nm_defined_only=no
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fi
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rm "$nm_defined_only_tmp_dir/ef"
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rmdir "$nm_defined_only_tmp_dir"
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])
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AC_MSG_RESULT([$grub_cv_prog_nm_defined_only])
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if test "x$grub_cv_prog_nm_defined_only" = xyes; then
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TARGET_NMFLAGS_DEFINED_ONLY=--defined-only
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else
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TARGET_NMFLAGS_DEFINED_ONLY=
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fi
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])
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dnl Check what symbol is defined as a bss start symbol.
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dnl Written by Michael Hohmoth and Yoshinori K. Okuji.
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AC_DEFUN([grub_CHECK_BSS_START_SYMBOL],
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[AC_REQUIRE([AC_PROG_CC])
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AC_MSG_CHECKING([if __bss_start is defined by the compiler])
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AC_CACHE_VAL(grub_cv_check_uscore_uscore_bss_start_symbol,
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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asm (".globl start; start:");
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void __main (void);
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void __main (void) {}
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int main (void);
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]],
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[[asm ("incl __bss_start")]])],
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[grub_cv_check_uscore_uscore_bss_start_symbol=yes],
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[grub_cv_check_uscore_uscore_bss_start_symbol=no])])
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AC_MSG_RESULT([$grub_cv_check_uscore_uscore_bss_start_symbol])
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AC_MSG_CHECKING([if edata is defined by the compiler])
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AC_CACHE_VAL(grub_cv_check_edata_symbol,
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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asm (".globl start; start:");
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void __main (void);
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void __main (void) {}
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int main (void);]],
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[[asm ("incl edata")]])],
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[grub_cv_check_edata_symbol=yes],
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[grub_cv_check_edata_symbol=no])])
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AC_MSG_RESULT([$grub_cv_check_edata_symbol])
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AC_MSG_CHECKING([if _edata is defined by the compiler])
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AC_CACHE_VAL(grub_cv_check_uscore_edata_symbol,
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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asm (".globl start; start:");
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void __main (void);
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void __main (void) {}
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int main (void);]],
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[[asm ("incl _edata")]])],
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[grub_cv_check_uscore_edata_symbol=yes],
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[grub_cv_check_uscore_edata_symbol=no])])
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AC_MSG_RESULT([$grub_cv_check_uscore_edata_symbol])
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if test "x$grub_cv_check_uscore_uscore_bss_start_symbol" = xyes; then
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BSS_START_SYMBOL=__bss_start
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elif test "x$grub_cv_check_edata_symbol" = xyes; then
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BSS_START_SYMBOL=edata
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elif test "x$grub_cv_check_uscore_edata_symbol" = xyes; then
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BSS_START_SYMBOL=_edata
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else
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AC_MSG_ERROR([none of __bss_start, edata or _edata is defined])
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fi
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])
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dnl Check what symbol is defined as an end symbol.
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dnl Written by Yoshinori K. Okuji.
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AC_DEFUN([grub_CHECK_END_SYMBOL],
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[AC_REQUIRE([AC_PROG_CC])
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AC_MSG_CHECKING([if end is defined by the compiler])
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AC_CACHE_VAL(grub_cv_check_end_symbol,
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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asm (".globl start; start:");
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void __main (void);
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void __main (void) {}
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int main (void);]],
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[[asm ("incl end")]])],
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[grub_cv_check_end_symbol=yes],
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[grub_cv_check_end_symbol=no])])
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AC_MSG_RESULT([$grub_cv_check_end_symbol])
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AC_MSG_CHECKING([if _end is defined by the compiler])
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AC_CACHE_VAL(grub_cv_check_uscore_end_symbol,
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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asm (".globl start; start:");
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void __main (void);
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void __main (void) {}
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int main (void);]],
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[[asm ("incl _end")]])],
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[grub_cv_check_uscore_end_symbol=yes],
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[grub_cv_check_uscore_end_symbol=no])])
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AC_MSG_RESULT([$grub_cv_check_uscore_end_symbol])
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if test "x$grub_cv_check_end_symbol" = xyes; then
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END_SYMBOL=end
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elif test "x$grub_cv_check_uscore_end_symbol" = xyes; then
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END_SYMBOL=_end
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else
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AC_MSG_ERROR([neither end nor _end is defined])
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fi
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])
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dnl Check if the C compiler supports `-fstack-protector'.
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AC_DEFUN([grub_CHECK_STACK_PROTECTOR],[
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[# Smashing stack protector.
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ssp_possible=yes]
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AC_MSG_CHECKING([whether `$CC' accepts `-fstack-protector'])
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# Is this a reliable test case?
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AC_LANG_CONFTEST([AC_LANG_SOURCE([[
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void foo (void) { volatile char a[8]; a[3]; }
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]])])
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[# `$CC -c -o ...' might not be portable. But, oh, well... Is calling
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# `ac_compile' like this correct, after all?
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if eval "$ac_compile -S -fstack-protector -o conftest.s" 2> /dev/null; then]
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AC_MSG_RESULT([yes])
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[# Should we clear up other files as well, having called `AC_LANG_CONFTEST'?
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rm -f conftest.s
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else
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ssp_possible=no]
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AC_MSG_RESULT([no])
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[fi]
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])
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dnl Check if the C compiler supports `-mstack-arg-probe' (Cygwin).
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AC_DEFUN([grub_CHECK_STACK_ARG_PROBE],[
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[# Smashing stack arg probe.
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sap_possible=yes]
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AC_MSG_CHECKING([whether `$CC' accepts `-mstack-arg-probe'])
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AC_LANG_CONFTEST([AC_LANG_SOURCE([[
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void foo (void) { volatile char a[8]; a[3]; }
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]])])
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[if eval "$ac_compile -S -mstack-arg-probe -Werror -o conftest.s" 2> /dev/null; then]
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AC_MSG_RESULT([yes])
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[# Should we clear up other files as well, having called `AC_LANG_CONFTEST'?
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rm -f conftest.s
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else
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sap_possible=no]
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AC_MSG_RESULT([no])
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[fi]
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])
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dnl Check if ln -s can handle directories properly (mingw).
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AC_DEFUN([grub_CHECK_LINK_DIR],[
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AC_MSG_CHECKING([whether ln -s can handle directories properly])
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[mkdir testdir 2>/dev/null
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case $srcdir in
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[\\/$]* | ?:[\\/]* ) reldir=$srcdir/include/grub/util ;;
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*) reldir=../$srcdir/include/grub/util ;;
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esac
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if ln -s $reldir testdir/util 2>/dev/null && rm -f testdir/util 2>/dev/null ; then]
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AC_MSG_RESULT([yes])
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[link_dir=yes
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else
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link_dir=no]
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AC_MSG_RESULT([no])
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[fi
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rm -rf testdir]
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])
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dnl Check if the C compiler supports `-fPIE'.
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AC_DEFUN([grub_CHECK_PIE],[
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[# Position independent executable.
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pie_possible=yes]
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AC_MSG_CHECKING([whether `$CC' has `-fPIE' as default])
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# Is this a reliable test case?
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AC_LANG_CONFTEST([AC_LANG_SOURCE([[
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#ifdef __PIE__
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int main() {
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return 0;
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}
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#else
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#error NO __PIE__ DEFINED
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#endif
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]])])
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[# `$CC -c -o ...' might not be portable. But, oh, well... Is calling
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# `ac_compile' like this correct, after all?
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if eval "$ac_compile -S -o conftest.s" 2> /dev/null; then]
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AC_MSG_RESULT([yes])
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[# Should we clear up other files as well, having called `AC_LANG_CONFTEST'?
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rm -f conftest.s
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else
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pie_possible=no]
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AC_MSG_RESULT([no])
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[fi]
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])
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AC_DEFUN([grub_CHECK_LINK_PIE],[
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[# Position independent executable.
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link_nopie_needed=no]
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AC_MSG_CHECKING([whether linker needs disabling of PIE to work])
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AC_LANG_CONFTEST([AC_LANG_SOURCE([[]])])
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[if eval "$ac_compile -Wl,-r,-d -nostdlib -Werror -o conftest.o" 2> /dev/null; then]
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AC_MSG_RESULT([no])
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[# Should we clear up other files as well, having called `AC_LANG_CONFTEST'?
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rm -f conftest.o
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else
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link_nopie_needed=yes]
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AC_MSG_RESULT([yes])
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[fi]
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])
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dnl Check if the Linker supports `-no-pie'.
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AC_DEFUN([grub_CHECK_NO_PIE],
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[AC_MSG_CHECKING([whether linker accepts -no-pie])
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AC_CACHE_VAL(grub_cv_cc_ld_no_pie,
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[save_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -no-pie -nostdlib -Werror"
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
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[grub_cv_cc_ld_no_pie=yes],
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[grub_cv_cc_ld_no_pie=no])
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LDFLAGS="$save_LDFLAGS"
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])
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AC_MSG_RESULT([$grub_cv_cc_ld_no_pie])
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nopie_possible=no
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if test "x$grub_cv_cc_ld_no_pie" = xyes ; then
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nopie_possible=yes
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fi
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])
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AC_DEFUN([grub_CHECK_NO_PIE_ONEWORD],
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[AC_MSG_CHECKING([whether linker accepts -nopie])
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AC_CACHE_VAL(grub_cv_cc_ld_no_pie_oneword,
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[save_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -nopie -nostdlib -Werror"
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
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[grub_cv_cc_ld_no_pie_oneword=yes],
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[grub_cv_cc_ld_no_pie_oneword=no])
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LDFLAGS="$save_LDFLAGS"
|
||
])
|
||
AC_MSG_RESULT([$grub_cv_cc_ld_no_pie_oneword])
|
||
nopie_oneword_possible=no
|
||
if test "x$grub_cv_cc_ld_no_pie_oneword" = xyes ; then
|
||
nopie_oneword_possible=yes
|
||
fi
|
||
])
|
||
|
||
dnl Check if the C compiler supports `-fPIC'.
|
||
AC_DEFUN([grub_CHECK_PIC],[
|
||
[# Position independent executable.
|
||
pic_possible=yes]
|
||
AC_MSG_CHECKING([whether `$CC' has `-fPIC' as default])
|
||
# Is this a reliable test case?
|
||
AC_LANG_CONFTEST([AC_LANG_SOURCE([[
|
||
#ifdef __PIC__
|
||
int main() {
|
||
return 0;
|
||
}
|
||
#else
|
||
#error NO __PIC__ DEFINED
|
||
#endif
|
||
]])])
|
||
|
||
[# `$CC -c -o ...' might not be portable. But, oh, well... Is calling
|
||
# `ac_compile' like this correct, after all?
|
||
if eval "$ac_compile -S -o conftest.s" 2> /dev/null; then]
|
||
AC_MSG_RESULT([yes])
|
||
[# Should we clear up other files as well, having called `AC_LANG_CONFTEST'?
|
||
rm -f conftest.s
|
||
else
|
||
pic_possible=no]
|
||
AC_MSG_RESULT([no])
|
||
[fi]
|
||
])
|
||
|
||
dnl Create an output variable with the transformed name of a GRUB utility
|
||
dnl program.
|
||
AC_DEFUN([grub_TRANSFORM],[dnl
|
||
AC_SUBST(AS_TR_SH([$1]), [`AS_ECHO([$1]) | sed "$program_transform_name"`])dnl
|
||
])
|