From 18cfa35a67584affb2e08360899288a039da7372 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?IOhannes=20m=20zm=C3=B6lnig?=
 <zmoelnig@users.sourceforge.net>
Date: Wed, 6 May 2009 17:16:15 +0000
Subject: (hopefully) better handling of the arch-stuff: keeping cppflags and
 cflags separate

svn path=/trunk/externals/iem/iemmatrix/; revision=11246
---
 src/acinclude.m4 | 59 +++++++++++++++++++++++++++++++++++---------------------
 1 file changed, 37 insertions(+), 22 deletions(-)

(limited to 'src/acinclude.m4')

diff --git a/src/acinclude.m4 b/src/acinclude.m4
index 30a5080..613f7e3 100644
--- a/src/acinclude.m4
+++ b/src/acinclude.m4
@@ -3,51 +3,70 @@ dnl This file is free software; IOhannes m zm
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 
-# AC_CHECK_CXXFLAGS(ADDITIONAL-CXXFLAGS, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
+# AC_CHECK_CPPFLAGS(ADDITIONAL-CPPFLAGS, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
 #
-# checks whether the $(CXX) compiler accepts the ADDITIONAL-CXXFLAGS
-# if so, they are added to the CXXFLAGS
-AC_DEFUN([AC_CHECK_CXXFLAGS],
+# checks whether the $(C) compiler accepts the ADDITIONAL-CPPFLAGS
+# if so, they are added to the CPPFLAGS
+AC_DEFUN([AC_CHECK_CPPFLAGS],
 [
-  AC_MSG_CHECKING([whether $CXX accepts "$1"])
-cat > conftest.c++ << EOF
+  AC_MSG_CHECKING([whether $CPP accepts "$1"])
+  temp_check_cppflags="${CPPFLAGS}"
+  CPPFLAGS="$1 ${CPPFLAGS}"
+  AC_PREPROC_IFELSE(
+        [AC_LANG_SOURCE([[int main(void){return 0;}]])],
+        [AC_MSG_RESULT([yes])],
+        [AC_MSG_RESULT([no]); CPPFLAGS="${temp_check_cppflags}"])
+])# AC_CHECK_CPPFLAGS
+
+
+
+# AC_CHECK_CFLAGS(ADDITIONAL-CFLAGS, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
+#
+# checks whether the $(C) compiler accepts the ADDITIONAL-CFLAGS
+# if so, they are added to the CFLAGS
+AC_DEFUN([AC_CHECK_CFLAGS],
+[
+  AC_MSG_CHECKING([whether $CC accepts "$1"])
+cat > conftest.c << EOF
 int main(){
   return 0;
 }
 EOF
-if $CXX $CPPFLAGS $CXXFLAGS -o conftest.o conftest.c++ [$1] > /dev/null 2>&1
+if $CC $CFLAGS [$1] -o conftest.o conftest.c > /dev/null 2>&1
 then
   AC_MSG_RESULT([yes])
-  CXXFLAGS="${CXXFLAGS} [$1]"
+  CFLAGS="${CFLAGS} [$1]"
+  AC_CHECK_CPPFLAGS([$1])
   [$2]
 else
   AC_MSG_RESULT([no])
   [$3]
 fi
-])# AC_CHECK_CXXFLAGS
+])# AC_CHECK_CFLAGS
 
-# AC_CHECK_CFLAGS(ADDITIONAL-CFLAGS, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
+# AC_CHECK_CXXFLAGS(ADDITIONAL-CXXFLAGS, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
 #
-# checks whether the $(C) compiler accepts the ADDITIONAL-CFLAGS
-# if so, they are added to the CFLAGS
-AC_DEFUN([AC_CHECK_CFLAGS],
+# checks whether the $(CXX) (c++) compiler accepts the ADDITIONAL-CXXFLAGS
+# if so, they are added to the CXXFLAGS
+AC_DEFUN([AC_CHECK_CXXFLAGS],
 [
-  AC_MSG_CHECKING([whether $CC accepts "$1"])
-cat > conftest.c << EOF
+  AC_MSG_CHECKING([whether $CXX accepts "$1"])
+cat > conftest.c++ << EOF
 int main(){
   return 0;
 }
 EOF
-if $CC $CFLAGS [$1] -o conftest.o conftest.c > /dev/null 2>&1
+if $CXX $CPPFLAGS $CXXFLAGS -o conftest.o conftest.c++ [$1] > /dev/null 2>&1
 then
   AC_MSG_RESULT([yes])
-  CFLAGS="${CFLAGS} [$1]"
+  CXXFLAGS="${CXXFLAGS} [$1]"
+  AC_CHECK_CPPFLAGS([$1])
   [$2]
 else
   AC_MSG_RESULT([no])
   [$3]
 fi
-])# AC_CHECK_CFLAGS
+])# AC_CHECK_CXXFLAGS
 
 # AC_CHECK_FRAMEWORK(FRAMEWORK, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
 #
@@ -131,15 +150,11 @@ if test "$fat_binary" != no; then
    done
 
    if test "x$[]Name" != "x"; then
-    tmp_arch_cflags="$CFLAGS"
     AC_CHECK_CFLAGS($[]Name,,[]Name="")
-    CFLAGS="$tmp_arch_cflags"
    fi
 
    if test "x$[]Name" != "x"; then
-    tmp_arch_ldflags="$LDFLAGS"
     AC_CHECK_LDFLAGS($[]Name,,[]Name="")
-    LDFLAGS="$tmp_arch_ldflags"
    fi
 
    undefine([Name])
-- 
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