solanum-vs-hackint-and-char.../m4/charybdis.m4

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AC_DEFUN([AC_DEFINE_DIR], [
test "x$prefix" = xNONE && prefix="$ac_default_prefix"
test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
last_ac_define_dir=`eval echo [$]$2`
ac_define_dir=`eval echo [$]last_ac_define_dir`
ac_define_dir_counter=0
while test "x[$]last_ac_define_dir" != "x[$]ac_define_dir"; do
last_ac_define_dir="[$]ac_define_dir"
ac_define_dir=`eval echo [$]last_ac_define_dir`
AS_VAR_ARITH([ac_define_dir_counter], [$ac_define_dir_counter + 1])
AS_VAR_IF([ac_define_dir_counter], [128],
[AC_MSG_ERROR([detected recusive directory expansion when expanding $1=[$]$2: [$]ac_define_dir])
break])
done
$1="$ac_define_dir"
AC_SUBST($1)
ifelse($3, ,
AC_DEFINE_UNQUOTED($1, "$ac_define_dir"),
AC_DEFINE_UNQUOTED($1, "$ac_define_dir", $3))
])
AC_DEFUN([AC_SUBST_DIR], [
ifelse($2,,,$1="[$]$2")
$1=`(
test "x$prefix" = xNONE && prefix="$ac_default_prefix"
test "x$exec_prefix" = xNONE && exec_prefix="${prefix}"
eval echo \""[$]$1"\"
)`
AC_SUBST($1)
])
2020-10-15 14:51:12 +00:00
dnl SOLANUM_C_GCC_TRY_FLAGS(<warnings>,<cachevar>)
AC_DEFUN([SOLANUM_C_GCC_TRY_FLAGS],[
AC_MSG_CHECKING([GCC flag(s) $1])
if test "${GCC-no}" = yes
then
AC_CACHE_VAL($2,[
oldcflags="${CFLAGS-}"
CFLAGS="${CFLAGS-} ${CWARNS} $1 -Werror"
AC_TRY_COMPILE([
#include <string.h>
#include <stdio.h>
int main(void);
],[
(void)strcmp("a","b"); fprintf(stdout,"test ok\n");
], [$2=yes], [$2=no])
CFLAGS="${oldcflags}"])
if test "x$$2" = xyes; then
CWARNS="${CWARNS}$1 "
AC_MSG_RESULT(ok)
else
$2=''
AC_MSG_RESULT(no)
fi
else
AC_MSG_RESULT(no, not using GCC)
fi
])