Import CUPS v2.0rc1

[thirdparty/cups.git] / config-scripts / cups-compiler.m4

diff --git a/config-scripts/cups-compiler.m4 b/config-scripts/cups-compiler.m4
index 421bfe7753c2fd49bbcd3d9f96a6cfe9646a6a32..ca3bae8e07001bf3e89dcd77cea5b890aef6dfc9 100644 (file)
--- a/config-scripts/cups-compiler.m4
+++ b/config-scripts/cups-compiler.m4
@@ -1,5 +1,5 @@
 dnl
-dnl "$Id: cups-compiler.m4 11683 2014-03-05 20:00:54Z msweet $"
+dnl "$Id: cups-compiler.m4 12122 2014-08-28 12:55:52Z msweet $"
 dnl
 dnl Compiler stuff for CUPS.
 dnl
@@ -110,7 +110,7 @@ if test -n "$GCC"; then
        # The -fstack-protector option is available with some versions of
        # GCC and adds "stack canaries" which detect when the return address
        # has been overwritten, preventing many types of exploit attacks.
-       AC_MSG_CHECKING(if GCC supports -fstack-protector)
+       AC_MSG_CHECKING(whether compiler supports -fstack-protector)
        OLDCFLAGS="$CFLAGS"
        CFLAGS="$CFLAGS -fstack-protector"
        AC_TRY_LINK(,,
@@ -130,7 +130,7 @@ if test -n "$GCC"; then
                # exploits that depend on a fixed address for common functions.
                #
                # Not available to LSB binaries...
-               AC_MSG_CHECKING(if GCC supports -fPIE)
+               AC_MSG_CHECKING(whether compiler supports -fPIE)
                OLDCFLAGS="$CFLAGS"
                case "$uname" in
                        Darwin*)
@@ -154,9 +154,18 @@ if test -n "$GCC"; then
 
        if test "x$with_optim" = x; then
                # Add useful warning options for tracking down problems...
-               OPTIM="-Wall -Wno-format-y2k -Wsign-conversion -Wunused $OPTIM"
+               OPTIM="-Wall -Wno-format-y2k -Wunused $OPTIM"
 
-               AC_MSG_CHECKING(if GCC supports -Wno-tautological-compare)
+               AC_MSG_CHECKING(whether compiler supports -Wsign-conversion)
+               OLDCFLAGS="$CFLAGS"
+               CFLAGS="$CFLAGS -Werror -Wsign-conversion"
+               AC_TRY_COMPILE(,,
+                       [OPTIM="$OPTIM -Wsign-conversion"
+                       AC_MSG_RESULT(yes)],
+                       AC_MSG_RESULT(no))
+               CFLAGS="$OLDCFLAGS"
+
+               AC_MSG_CHECKING(whether compiler supports -Wno-tautological-compare)
                OLDCFLAGS="$CFLAGS"
                CFLAGS="$CFLAGS -Werror -Wno-tautological-compare"
                AC_TRY_COMPILE(,,
@@ -211,7 +220,7 @@ else
                        # should contribute the necessary options to
                        # cups-support@cups.org...
                        echo "Building CUPS with default compiler optimizations; contact"
-                       echo "cups-bugs@cups.org with uname and compiler options needed"
+                       echo "cups-devel@cups.org with uname and compiler options needed"
                        echo "for your platform, or set the CFLAGS and LDFLAGS environment"
                        echo "variables before running configure."
                        ;;
@@ -228,5 +237,5 @@ case $uname in
 esac
 
 dnl
-dnl End of "$Id: cups-compiler.m4 11683 2014-03-05 20:00:54Z msweet $".
+dnl End of "$Id: cups-compiler.m4 12122 2014-08-28 12:55:52Z msweet $".
 dnl