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gcc: add poison parameters detection
Add the logic that, if not configured with "--enable-target-optspace",
gcc will meet error when build target app with "-Os" option.
This could avoid potential binary crash.
Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
Index: gcc-4_5-branch/gcc/config.in
===================================================================
--- gcc-4_5-branch.orig/gcc/config.in
+++ gcc-4_5-branch/gcc/config.in
@@ -138,6 +138,12 @@
#endif
+/* Define to enable target optspace support. */
+#ifndef USED_FOR_TARGET
+#undef ENABLE_TARGET_OPTSPACE
+#endif
+
+
/* Define if you want all operations on RTL (the basic data structure of the
optimizer and back end) to be checked for dynamic type safety at runtime.
This is quite expensive. */
Index: gcc-4_5-branch/gcc/configure
===================================================================
--- gcc-4_5-branch.orig/gcc/configure
+++ gcc-4_5-branch/gcc/configure
@@ -915,6 +915,7 @@ enable_version_specific_runtime_libs
with_slibdir
enable_poison_system_directories
enable_plugin
+enable_target_optspace
'
ac_precious_vars='build_alias
host_alias
@@ -25658,6 +25659,13 @@ $as_echo "#define ENABLE_PLUGIN 1" >>con
fi
+if test x"$enable_target_optspace" != x; then :
+
+$as_echo "#define ENABLE_TARGET_OPTSPACE 1" >>confdefs.h
+
+fi
+
+
# Configure the subdirectories
# AC_CONFIG_SUBDIRS($subdirs)
Index: gcc-4_5-branch/gcc/configure.ac
===================================================================
--- gcc-4_5-branch.orig/gcc/configure.ac
+++ gcc-4_5-branch/gcc/configure.ac
@@ -4659,6 +4659,11 @@ if test x"$enable_plugin" = x"yes"; then
AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
fi
+AC_SUBST(enable_target_optspace)
+if test x"$enable_target_optspace" != x; then
+ AC_DEFINE(ENABLE_TARGET_OPTSPACE, 1, [Define to enable target optspace support.])
+fi
+
# Configure the subdirectories
# AC_CONFIG_SUBDIRS($subdirs)
Index: gcc-4_5-branch/gcc/opts.c
===================================================================
--- gcc-4_5-branch.orig/gcc/opts.c
+++ gcc-4_5-branch/gcc/opts.c
@@ -953,6 +953,11 @@ decode_options (unsigned int argc, const
else
set_param_value ("min-crossjump-insns", initial_min_crossjump_insns);
+#ifndef ENABLE_TARGET_OPTSPACE
+ if (optimize_size == 1)
+ error ("Do not use -Os option if --enable-target-optspace is not set.");
+#endif
+
if (first_time_p)
{
/* Initialize whether `char' is signed. */
|
