From 83cffaa083113ffb230905e6bb388d4f5ae49c4a Mon Sep 17 00:00:00 2001
From: Dagobert Michelsen <dam@opencsw.org>
Date: Fri, 28 Jun 2019 10:55:16 +0200
Subject: [PATCH] Use GCC-specific flags only when compiling with GCC

(cherry picked from commit 9317d0734808f56a5d181ff2864332705fcb87e0)
---
 configure.ac | 28 +++++++++++++++++++---------
 1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/configure.ac b/configure.ac
index 7454fb4c..b2dcabf8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -777,8 +777,10 @@ AC_CHECK_FUNCS_ONCE([ \
 
 AC_FUNC_STRERROR_R
 
-SAVE_CFLAGS="$CFLAGS"
-CFLAGS="-Wall -Werror"
+if test "x$GCC" = "xyes"; then
+  SAVE_CFLAGS="$CFLAGS"
+  CFLAGS="$CFLAGS -Wall -Werror"
+fi
 SAVE_LDFLAGS="$LDFLAGS"
 LDFLAGS=""
 if test "x$ac_system" = "xWindows"; then
@@ -3868,7 +3870,10 @@ if test "x$with_libnetsnmp" = "xyes"; then
   SAVE_CPPFLAGS="$CPPFLAGS"
   SAVE_LDFLAGS="$LDFLAGS"
   SAVE_LIBS="$LIBS"
-  CPPFLAGS="$CPPFLAGS $with_libnetsnmp_cppflags -Wall -Werror"
+  CPPFLAGS="$CPPFLAGS $with_libnetsnmp_cppflags"
+  if test "x$GCC" = "xyes"; then
+    CPPFLAGS="$CPPFLAGS -Wall -Werror"
+  fi
   LDFLAGS="$LDFLAGS $with_libnetsnmp_ldflags"
   LIBS="$LIBS -lnetsnmp"
 
@@ -4331,7 +4336,10 @@ if test "x$with_libperl" = "xyes"; then
   # (see issues #41 and #42)
   SAVE_CFLAGS="$CFLAGS"
   SAVE_LIBS="$LIBS"
-  CFLAGS="$CFLAGS $PERL_CFLAGS -Wall -Werror"
+  CFLAGS="$CFLAGS $PERL_CFLAGS"
+  if test "x$GCC" = "xyes"; then
+    CFLAGS="$CFLAGS -Wall -Werror"
+  fi
   LIBS="$LIBS $PERL_LIBS"
 
   AC_CACHE_CHECK([for broken Perl_load_module()],
@@ -7076,11 +7084,13 @@ AC_SUBST([LCC_VERSION_STRING])
 
 AC_CONFIG_FILES([src/libcollectdclient/collectd/lcc_features.h])
 
-AM_CFLAGS="-Wall"
-AM_CXXFLAGS="-Wall"
-if test "x$enable_werror" != "xno"; then
-  AM_CFLAGS="$AM_CFLAGS -Werror"
-  AM_CXXFLAGS="$AM_CXXFLAGS -Werror"
+if test "x$GCC" = "xyes"; then
+  AM_CFLAGS="-Wall"
+  AM_CXXFLAGS="-Wall"
+  if test "x$enable_werror" != "xno"; then
+    AM_CFLAGS="$AM_CFLAGS -Werror"
+    AM_CXXFLAGS="$AM_CXXFLAGS -Werror"
+  fi
 fi
 
 AC_SUBST([AM_CFLAGS])
-- 
2.11.0