From: Mark Wielaard <mark@klomp.org>
Date: Sat, 28 Jan 2023 20:11:35 +0000 (+0100)
Subject: configure.ac: Update AC_PROG_CC checks
X-Git-Tag: VALGRIND_3_21_0~196
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=092d9085442a2519d7b1bdbc79334a307ad55574;p=thirdparty%2Fvalgrind.git

configure.ac: Update AC_PROG_CC checks

AM_PROG_CC_C_O has been obsolete since automake 1.14.
AC_PROG_CC does the same check. With autoconf 2.70 we
must use AC_PROG_CC (which will check for c11 and c99),
for earlier versions we'll use AC_PROG_CC_C99.
---

diff --git a/configure.ac b/configure.ac
index 47b2a5fe8f..625063beb4 100755
--- a/configure.ac
+++ b/configure.ac
@@ -50,8 +50,11 @@ CXXFLAGS="$CXXFLAGS"
 #----------------------------------------------------------------------------
 
 AC_PROG_LN_S
-AC_PROG_CC
-AM_PROG_CC_C_O
+m4_version_prereq([2.70], [AC_PROG_CC], [AC_PROG_CC_C99])
+# Make sure we can compile in C99 mode.
+if test "$ac_cv_prog_cc_c99" = "no"; then
+    AC_MSG_ERROR([Valgrind relies on a C compiler supporting C99])
+fi
 AC_PROG_CPP
 AC_PROG_CXX
 # AC_PROG_OBJC apparently causes problems on older Linux distros (eg. with
@@ -136,12 +139,6 @@ else
 fi
 rm $tmpfile
 
-# Make sure we can compile in C99 mode.
-AC_PROG_CC_C99
-if test "$ac_cv_prog_cc_c99" = "no"; then
-    AC_MSG_ERROR([Valgrind relies on a C compiler supporting C99])
-fi
-
 # We don't want gcc < 3.0
 AC_MSG_CHECKING([for a supported version of gcc])