Default to optimised builds when using a Sun Studio compiler.

Autoconf's AC_PROG_CC sets the default CFLAGS to -O2 -g for
gcc and -g for every other compiler.  This patch defaults
CFLAGS to the equivalent -O -g when we're using Sun Studio's cc
if the user or site admin hasn't already set CFLAGS.

diff --git a/configure.ac b/configure.ac
index 20c9e7a..832ed8b 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -65,6 +65,8 @@ AM_CONFIG_HEADER(config.h)
 
 AC_CANONICAL_HOST
 
+test_CFLAGS=${CFLAGS+set} # We may override autoconf default CFLAGS.
+
 AC_PROG_CC
 AC_PROG_LIBTOOL
 AC_CHECK_FUNCS([getisax])
@@ -75,6 +77,16 @@ AC_C_INLINE
 AC_CHECK_DECL([__SUNPRO_C], [SUNCC="yes"], [SUNCC="no"])
 AC_CHECK_DECL([__amd64], [AMD64_ABI="yes"], [AMD64_ABI="no"])
 
+# Default CFLAGS to -O -g rather than just the -g from AC_PROG_CC
+# if we're using Sun Studio and neither the user nor a config.site
+# has set CFLAGS.
+if test $SUNCC = yes &&                        \
+   test "$test_CFLAGS" == "" &&                \
+   test "$CFLAGS" = "-g"
+then
+  CFLAGS="-O -g"
+fi
+
 # 
 # We ignore pixman_major in the version here because the major version should
 # always be encoded in the actual library name. Ie., the soname is: