[FYI, PATCH] Add TFLAGS to gcc's GCC_FOR_TARGET

[Alexandre Oliva <oliva@adacore.com>]

When the GCC build runs GCC_FOR_TARGET, e.g. for selftests or for
dumping specs, it doesn't use TFLAGS in non-bootstrap scenarios.  This
patch arranges for TFLAGS to be passed from the top level down to gcc
in GCC_FOR_TARGET in this case.

Another issue related with TFLAGS fixed herein is that there's no easy
way to add a TFLAGS to GCC_FOR_TARGET when running "make gnatlib"
within the gcc directory.  Overriding all of GCC_FOR_TARGET is
somewhat cumbersome, so I'm adding TFLAGS support to gcc/Makefile.in,
getting it added to GCC_FOR_TARGET, as it would when passed down from
the top level.

Regstrapped on x86_64-linux-gnu.  I'm checking this in.


for  ChangeLog

	* Makefile.tpl (HOST_EXPORTS): Add TFLAGS to GCC_FOR_TARGET.
	(EXTRA_GCC_FLAGS): Likewise.
	* Makefile.in: Rebuilt.

for  gcc/ChangeLog

	* Makefile.in (TFLAGS): New.
	(GCC_FOR_TARGET): Add TFLAGS.
	(FLAGS_TO_PASS): Pass TFLAGS down.
---
 Makefile.in     |    4 ++--
 Makefile.tpl    |    4 ++--
 gcc/Makefile.in |    6 +++++-
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/Makefile.in b/Makefile.in
index 593495e16503a..13ee95a2602ab 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -222,7 +222,7 @@ HOST_EXPORTS = \
 	AR_FOR_TARGET="$(AR_FOR_TARGET)"; export AR_FOR_TARGET; \
 	AS_FOR_TARGET="$(AS_FOR_TARGET)"; export AS_FOR_TARGET; \
 	DSYMUTIL_FOR_TARGET="$(DSYMUTIL_FOR_TARGET)"; export DSYMUTIL_FOR_TARGET; \
-	GCC_FOR_TARGET="$(GCC_FOR_TARGET)"; export GCC_FOR_TARGET; \
+	GCC_FOR_TARGET="$(GCC_FOR_TARGET) $$TFLAGS"; export GCC_FOR_TARGET; \
 	LD_FOR_TARGET="$(LD_FOR_TARGET)"; export LD_FOR_TARGET; \
 	NM_FOR_TARGET="$(NM_FOR_TARGET)"; export NM_FOR_TARGET; \
 	OBJDUMP_FOR_TARGET="$(OBJDUMP_FOR_TARGET)"; export OBJDUMP_FOR_TARGET; \
@@ -1047,7 +1047,7 @@ TARGET_FLAGS_TO_PASS = $(BASE_FLAGS_TO_PASS) $(EXTRA_TARGET_FLAGS)
 # The BUILD_* variables are a special case, which are used for the gcc
 # cross-building scheme.
 EXTRA_GCC_FLAGS = \
-	"GCC_FOR_TARGET=$(GCC_FOR_TARGET)" \
+	"GCC_FOR_TARGET=$(GCC_FOR_TARGET) $$TFLAGS" \
 	"`echo 'STMP_FIXPROTO=$(STMP_FIXPROTO)' | sed -e s'/[^=][^=]*=$$/XFOO=/'`" \
 	"`echo 'LIMITS_H_TEST=$(LIMITS_H_TEST)' | sed -e s'/[^=][^=]*=$$/XFOO=/'`"
 
diff --git a/Makefile.tpl b/Makefile.tpl
index ef58fac2b9a8b..ba0727153a9b8 100644
--- a/Makefile.tpl
+++ b/Makefile.tpl
@@ -225,7 +225,7 @@ HOST_EXPORTS = \
 	AR_FOR_TARGET="$(AR_FOR_TARGET)"; export AR_FOR_TARGET; \
 	AS_FOR_TARGET="$(AS_FOR_TARGET)"; export AS_FOR_TARGET; \
 	DSYMUTIL_FOR_TARGET="$(DSYMUTIL_FOR_TARGET)"; export DSYMUTIL_FOR_TARGET; \
-	GCC_FOR_TARGET="$(GCC_FOR_TARGET)"; export GCC_FOR_TARGET; \
+	GCC_FOR_TARGET="$(GCC_FOR_TARGET) $$TFLAGS"; export GCC_FOR_TARGET; \
 	LD_FOR_TARGET="$(LD_FOR_TARGET)"; export LD_FOR_TARGET; \
 	NM_FOR_TARGET="$(NM_FOR_TARGET)"; export NM_FOR_TARGET; \
 	OBJDUMP_FOR_TARGET="$(OBJDUMP_FOR_TARGET)"; export OBJDUMP_FOR_TARGET; \
@@ -801,7 +801,7 @@ TARGET_FLAGS_TO_PASS = $(BASE_FLAGS_TO_PASS) $(EXTRA_TARGET_FLAGS)
 # The BUILD_* variables are a special case, which are used for the gcc
 # cross-building scheme.
 EXTRA_GCC_FLAGS = \
-	"GCC_FOR_TARGET=$(GCC_FOR_TARGET)" \
+	"GCC_FOR_TARGET=$(GCC_FOR_TARGET) $$TFLAGS" \
 	"`echo 'STMP_FIXPROTO=$(STMP_FIXPROTO)' | sed -e s'/[^=][^=]*=$$/XFOO=/'`" \
 	"`echo 'LIMITS_H_TEST=$(LIMITS_H_TEST)' | sed -e s'/[^=][^=]*=$$/XFOO=/'`"
 
diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index 97e5450ecb593..27ac641270f99 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -146,8 +146,11 @@ endif
 # CFLAGS is for the user to override to, e.g., do a cross build with -O2.
 # TCFLAGS is used for compilations with the GCC just built.
 # T_CFLAGS is used for all compilations and is overridden by t-* files.
+# TFLAGS is also for the user to override, passed down from the top-level
+# Makefile.  It is used for all compilations,
 T_CFLAGS =
 TCFLAGS =
+TFLAGS =
 CFLAGS = @CFLAGS@
 CXXFLAGS = @CXXFLAGS@
 LDFLAGS = @LDFLAGS@
@@ -457,7 +460,7 @@ T_STDINT_GCC_H = $(srcdir)/ginclude/stdint-gcc.h
 # The GCC to use for compiling crt*.o.
 # Usually the one we just built.
 # Don't use this as a dependency--use $(GCC_PASSES).
-GCC_FOR_TARGET = $(STAGE_CC_WRAPPER) ./xgcc -B./ -B$(build_tooldir)/bin/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include -L$(objdir)/../ld
+GCC_FOR_TARGET = $(STAGE_CC_WRAPPER) ./xgcc -B./ -B$(build_tooldir)/bin/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include -L$(objdir)/../ld $(TFLAGS)
 
 # Set if the compiler was configured with --with-build-sysroot.
 SYSROOT_CFLAGS_FOR_TARGET = @SYSROOT_CFLAGS_FOR_TARGET@
@@ -1193,6 +1196,7 @@ FLAGS_TO_PASS = \
 	"MAKEINFOFLAGS=$(MAKEINFOFLAGS)" \
 	"MAKEOVERRIDES=" \
 	"SHELL=$(SHELL)" \
+	"TFLAGS=$(TFLAGS)" \
 	"exeext=$(exeext)" \
 	"build_exeext=$(build_exeext)" \
 	"objext=$(objext)" \


-- 
Alexandre Oliva, happy hacker                https://FSFLA.org/blogs/lxo/
   Free Software Activist                       GNU Toolchain Engineer
Disinformation flourishes because many people care deeply about injustice
but very few check the facts.  Ask me about <https://stallmansupport.org>