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build-sys: Add the SPICE_WARNING() and SPICE_PRINT_MESSAGES m4 macros

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A call to SPICE_WARNING() anywhere in the configure file results in the
warning being printed at the end of the configure run where it will be
be visible. This makes it possible to keep the SPICE_WARNING() calls
together with the related feature checks instead of having to put a
separate AC_MSG_WARN() call near the end.

Signed-off-by: Francois Gouget <fgouget@codeweavers.com>
This commit is contained in:
Francois Gouget 2015-11-03 13:05:28 +01:00 committed by Christophe Fergeau
parent 304a16fdad
commit 899a7c75e3
1 changed files with 21 additions and 0 deletions
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21
m4/spice-deps.m4
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@ -1,3 +1,24 @@
# For autoconf < 2.63
m4_ifndef([AS_VAR_APPEND],
AC_DEFUN([AS_VAR_APPEND], $1=$$1$2))
# SPICE_WARNING(warning)
# SPICE_PRINT_MESSAGES
# ----------------------
# Collect warnings and print them at the end so they are clearly visible.
# ---------------------
AC_DEFUN([SPICE_WARNING],AS_VAR_APPEND([spice_warnings],["|$1"]))
AC_DEFUN([SPICE_PRINT_MESSAGES],[
ac_save_IFS="$IFS"
IFS="|"
for msg in $spice_warnings; do
IFS="$ac_save_IFS"
AS_VAR_IF([msg],[],,[AC_MSG_WARN([$msg]); echo >&2])
done
IFS="$ac_save_IFS"
])
# SPICE_CHECK_SYSDEPS()
# ---------------------
# Checks for header files and library functions needed by spice-common.