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Add cross-compiling argument to AC_RUN_IFELSE #12966

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Add cross-compiling argument to AC_RUN_IFELSE #12966

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Add cross-compiling 3rd argument to AC_RUN_IFELSE 
Autotools emits warning if 3rd argument is empty. Call is wrapped in the
AC_CACHE_CHECK with php_cv_* cache variable name according to the docs.
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@petk
petk committed Dec 22, 2023
commit bcab663f17f70aa59891dcfdb05b50522dd2d928
5 changes: 3 additions & 2 deletions configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -1586,15 +1586,16 @@ if test "$PHP_UNDEFINED_SANITIZER" = "yes"; then
dnl cast to void*. In that case, set -fno-sanitize=function.
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fno-sanitize-recover=undefined"
AC_CACHE_CHECK([whether to add -fno-sanitize=function],[php_cv_ubsan_no_function],[
AC_RUN_IFELSE([AC_LANG_SOURCE([[
void foo(char *string) {}
int main(void) {
void (*f)(void *) = (void (*)(void *))foo;
f("foo");
}
]])],,[ubsan_needs_no_function=yes],)
]])],[php_cv_ubsan_no_function=no],[php_cv_ubsan_no_function=yes],[php_cv_ubsan_no_function=no])])
CFLAGS="$OLD_CFLAGS"
if test "$ubsan_needs_no_function" = yes; then
if test "$php_cv_ubsan_no_function" = yes; then
CFLAGS="$CFLAGS -fno-sanitize=function"
CXXFLAGS="$CFLAGS -fno-sanitize=function"
fi
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