From 87ec00322ed6caa207747ce00ed38ca15995ec63 Mon Sep 17 00:00:00 2001
From: Kito Cheng <kito.cheng@gmail.com>
Date: Fri, 4 Nov 2016 15:03:55 +0800
Subject: [PATCH] Add --enable-gcc-checking to configure option (#191)

---
 Makefile.in  |  4 ++++
 configure    | 21 +++++++++++++++++++++
 configure.ac | 10 ++++++++++
 3 files changed, 35 insertions(+)

diff --git a/Makefile.in b/Makefile.in
index 47fc05ea..09baa6cf 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -44,6 +44,7 @@ ATOMIC_CFLAGS := @atomic_cflags@
 BINUTILS_FLOAT_FLAGS := @binutils_float_flags@
 GCC_FLOAT_FLAGS := @gcc_float_flags@
 GLIBC_FLOAT_FLAGS := @glibc_float_flags@
+GCC_CHECKING_FLAGS := @gcc_checking@
 
 CFLAGS_FOR_TARGET := $(CFLAGS_FOR_TARGET_EXTRA) $(ATOMIC_CFLAGS)
 ASFLAGS_FOR_TARGET := $(ASFLAGS_FOR_TARGET_EXTRA)
@@ -197,6 +198,7 @@ stamps/build-gcc-linux-stage1: $(srcdir)/riscv-gcc stamps/build-binutils-linux \
 		--disable-nls \
 		--disable-bootstrap \
 		$(GCC_FLOAT_FLAGS) \
+		$(GCC_CHECKING_FLAGS) \
 		$(MULTILIB_FLAGS) \
 		$(WITH_ARCH)
 	$(MAKE) -C $(notdir $@) inhibit-libc=true all-gcc
@@ -222,6 +224,7 @@ stamps/build-gcc-linux-stage2: $(srcdir)/riscv-gcc stamps/build-glibc-linux$(XLE
 		--disable-nls \
 		--disable-bootstrap \
 		$(GCC_FLOAT_FLAGS) \
+		$(GCC_CHECKING_FLAGS) \
 		$(MULTILIB_FLAGS) \
 		$(WITH_ARCH)
 	$(MAKE) -C $(notdir $@)
@@ -267,6 +270,7 @@ stamps/build-gcc-newlib: src/newlib-gcc stamps/build-binutils-newlib
 		--disable-libgomp \
 		--disable-nls \
 		$(GCC_FLOAT_FLAGS) \
+		$(GCC_CHECKING_FLAGS) \
 		$(MULTILIB_FLAGS) \
 		$(WITH_ARCH)
 	$(MAKE) -C $(notdir $@) inhibit-libc=true
diff --git a/configure b/configure
index 2e6dea80..b2ce5b77 100755
--- a/configure
+++ b/configure
@@ -584,6 +584,7 @@ PACKAGE_URL=''
 
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
+gcc_checking
 multilib_flags
 glibc_float_flags
 gcc_float_flags
@@ -656,6 +657,7 @@ enable_atomic
 enable_float
 with_arch
 enable_multilib
+enable_gcc_checking
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1282,6 +1284,9 @@ Optional Features:
                           [--enable-float]
   --enable-multilib       build both RV32 and RV64 runtime libraries
                           [--disable-multilib]
+  --enable-gcc-checking   Enable gcc internal checking, it will make gcc very
+                          slow, only enable it when developing gcc
+                          [--disable-gcc-checking]
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -3303,6 +3308,22 @@ else
 
 fi
 
+# Check whether --enable-gcc-checking was given.
+if test "${enable_gcc_checking+set}" = set; then :
+  enableval=$enable_gcc_checking;
+else
+  enable_gcc_checking=yes
+
+fi
+
+if test "x$enable_gcc_checking" != xno; then :
+  gcc_checking=--enable-checking=yes
+
+else
+  gcc_checking=--enable-checking=release
+
+fi
+
 ac_config_files="$ac_config_files Makefile"
 
 ac_config_files="$ac_config_files scripts/wrapper/awk/awk"
diff --git a/configure.ac b/configure.ac
index 89b3f63b..3896ce80 100644
--- a/configure.ac
+++ b/configure.ac
@@ -122,6 +122,16 @@ AS_IF([test "x$enable_multilib" != xno],
         [AC_SUBST(multilib_flags,)],
 	[AC_SUBST(multilib_flags,--disable-multilib)])
 
+AC_ARG_ENABLE(gcc-checking,
+        [AS_HELP_STRING([--enable-gcc-checking],
+		[Enable gcc internal checking, it will make gcc very slow, only enable it when developing gcc @<:@--disable-gcc-checking@:>@])],
+        [],
+        [enable_gcc_checking=yes]
+        )
+AS_IF([test "x$enable_gcc_checking" != xno],
+	[AC_SUBST(gcc_checking, --enable-checking=yes)],
+	[AC_SUBST(gcc_checking, --enable-checking=release)])
+
 AC_CONFIG_FILES([Makefile])
 AC_CONFIG_FILES([scripts/wrapper/awk/awk], [chmod +x scripts/wrapper/awk])
 AC_CONFIG_FILES([scripts/wrapper/sed/sed], [chmod +x scripts/wrapper/sed])