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add compile flags check

This commit is contained in:
Sukchan Lee 2017-02-08 12:48:35 +09:00
parent f0e2dbafb7
commit 8837c07314
2 changed files with 19 additions and 0 deletions
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16
acinclude.m4
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@ -72,3 +72,19 @@ EOF
CORE_SUBST_OLD(CONFIGURE_COMMAND)
CORE_SUBST_OLD(CONFIGURE_OPTIONS)
])
AC_DEFUN([AX_CHECK_COMPILE_FLAG],
[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX
AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
_AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
[AS_VAR_SET(CACHEVAR,[yes])],
[AS_VAR_SET(CACHEVAR,[no])])
_AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes],
[m4_default([$2], :)],
[m4_default([$3], :)])
AS_VAR_POPDEF([CACHEVAR])dnl
])dnl AX_CHECK_COMPILE_FLAGS

3
configure.ac
View File

@ -65,6 +65,9 @@ AC_PROG_AWK
AM_PROG_AR
AM_PROG_LIBTOOL
dnl Checks for compile flag
AX_CHECK_COMPILE_FLAG([-Wno-pointer-to-int-cast], [CFLAGS="$CFLAGS -Wno-pointer-to-int-cast"])
dnl Checks for pointer size
AC_CHECK_SIZEOF(void*, 4)