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762f9ef3d9
Improve the autoconf code for finding libtirpc and do not assume the
headers are in /usr/include/tirpc.
Also remove this assumption from the `rpc/xdr.h` header in libspl and
use the same `#include_next` mechanism that is used for other libspl
headers.
Include pkg.m4 from pkg-config in config/ for PKG_CHECK_MODULES(), the
file license allows this.
Include ax_save_flags.m4 and ax_restore_flags.m4 from autoconf-archive,
the file licenses are compatible. Use the 2012 versions so as not rely
on a more recent autoconf feature AS_VAR_COPY(), which breaks some build
slaves.
Add new macro library `config/find_system_library.m4` which defines the
FIND_SYSTEM_LIBRARY() macro which is a convenience wrapper over using
PKG_CHECK_MODULES() with a fallback to standard library locations and
some sanity checks.
The parameters are:
```
FIND_SYSTEM_LIBRARY(VARIABLE-PREFIX, MODULE, HEADER, HEADER-PREFIXES,
LIBRARY, FUNCTIONS, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
```
`HEADER-PREFIXES` and `FUNCTIONS` are comma-separated m4 lists.
For libtirpc we are using:
```
FIND_SYSTEM_LIBRARY(LIBTIRPC, [libtirpc], [rpc/xdr.h], [tirpc], [tirpc],
[xdrmem_create], [], [...])
```
The headers are first checked for without the prefixes and then with.
This system works with pkg-config and falls back on checking standard
header/library locations, it can be easily overridden by the user by
setting the `PREFIX_CFLAGS` and `PREFIX_LIBS` variables which are
automatically added to the `./configure --help` output.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rafael Kitover <rkitover@gmail.com>
Closes #7422
Closes #8313
74 lines
2.5 KiB
Plaintext
74 lines
2.5 KiB
Plaintext
# find_system_lib.m4 - Macros to search for a system library. -*- Autoconf -*-
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dnl requires pkg.m4 from pkg-config
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dnl requires ax_save_flags.m4 from autoconf-archive
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dnl requires ax_restore_flags.m4 from autoconf-archive
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dnl FIND_SYSTEM_LIBRARY(VARIABLE-PREFIX, MODULE, HEADER, HEADER-PREFIXES, LIBRARY, FUNCTIONS, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
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AC_DEFUN([FIND_SYSTEM_LIBRARY], [
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AC_REQUIRE([PKG_PROG_PKG_CONFIG])
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_library_found=
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PKG_CHECK_MODULES([$1], [$2], [_library_found=1], [
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AS_IF([test -f /usr/include/[$3]], [
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AC_SUBST([$1][_CFLAGS], [])
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AC_SUBST([$1][_LIBS], ["-l[$5]]")
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_library_found=1
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],[ AS_IF([test -f /usr/local/include/[$3]], [
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AC_SUBST([$1][_CFLAGS], ["-I/usr/local/include"])
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AC_SUBST([$1][_LIBS], ["-L/usr/local -l[$5]]")
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_library_found=1
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],[dnl ELSE
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m4_foreach([prefix], [$4], [
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AS_IF([test "x$_library_found" != "x1"], [
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AS_IF([test -f [/usr/include/]prefix[/][$3]], [
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AC_SUBST([$1][_CFLAGS], ["[-I/usr/include/]prefix["]])
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AC_SUBST([$1][_LIBS], ["-l[$5]]")
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_library_found=1
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],[ AS_IF([test -f [/usr/local/include/]prefix[/][$3]], [
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AC_SUBST([$1][_CFLAGS], ["[-I/usr/local/include/]prefix["]])
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AC_SUBST([$1][_LIBS], ["-L/usr/local -l[$5]"])
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_library_found=1
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])])
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])
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])
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])])
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AS_IF([test -z "$_library_found"], [
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AC_MSG_WARN([cannot find [$2] via pkg-config or in the standard locations])
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])
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])
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dnl do some further sanity checks
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AS_IF([test -n "$_library_found"], [
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AX_SAVE_FLAGS
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CPPFLAGS="$CPPFLAGS $(echo $[$1][_CFLAGS] | sed 's/-include */-include-/g; s/^/ /; s/ [^-][^ ]*//g; s/ -[^Ii][^ ]*//g; s/-include-/-include /g; s/^ //;')"
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CFLAGS="$CFLAGS $[$1][_CFLAGS]"
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LDFLAGS="$LDFLAGS $[$1][_LIBS]"
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AC_CHECK_HEADER([$3], [], [
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AC_MSG_WARN([header [$3] for library [$2] is not usable])
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_library_found=
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])
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m4_foreach([func], [$6], [
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AC_CHECK_LIB([$5], func, [], [
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AC_MSG_WARN([cannot find ]func[ in library [$5]])
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_library_found=
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])
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])
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AX_RESTORE_FLAGS
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])
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AS_IF([test -n "$_library_found"], [
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:;$7
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],[dnl ELSE
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:;$8
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])
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])
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