gcc/configure needs this to generate auto-build.h using the right C++
compiler.
2019-06-18 Michael Forney <mfor...@mforney.org>
* Makefile.tpl (HOST_EXPORTS): Add CXX_FOR_BUILD.
* Makefile.in: Regenerate.
---
I ran into this since I needed to pass some special flags to the build
C++ compiler for my system and was getting the mysterious error
make[3]: *** No rule to make target 'auto-build.h', needed by
'build/genmddeps.o'. Stop.
Turns out this was because the sub-configure run by gcc/configure was
failing because my CXX_FOR_BUILD was being ignored, but it is not treated
as a fatal error (#65794). The configure directory containing config.log
is subsequently deleted, making it difficult to figure out what actually
went wrong.
Makefile.in | 1 +
Makefile.tpl | 1 +
2 files changed, 2 insertions(+)
diff --git a/Makefile.in b/Makefile.in
index 02cc7a39094..86c0c6d5b2d 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -198,6 +198,7 @@ HOST_EXPORTS = \
AR="$(AR)"; export AR; \
AS="$(AS)"; export AS; \
CC_FOR_BUILD="$(CC_FOR_BUILD)"; export CC_FOR_BUILD; \
+ CXX_FOR_BUILD="$(CXX_FOR_BUILD)"; export CXX_FOR_BUILD; \
DLLTOOL="$(DLLTOOL)"; export DLLTOOL; \
LD="$(LD)"; export LD; \
LDFLAGS="$(STAGE1_LDFLAGS) $(LDFLAGS)"; export LDFLAGS; \
diff --git a/Makefile.tpl b/Makefile.tpl
index 1cdc023c82f..efed1511750 100644
--- a/Makefile.tpl
+++ b/Makefile.tpl
@@ -201,6 +201,7 @@ HOST_EXPORTS = \
AR="$(AR)"; export AR; \
AS="$(AS)"; export AS; \
CC_FOR_BUILD="$(CC_FOR_BUILD)"; export CC_FOR_BUILD; \
+ CXX_FOR_BUILD="$(CXX_FOR_BUILD)"; export CXX_FOR_BUILD; \
DLLTOOL="$(DLLTOOL)"; export DLLTOOL; \
LD="$(LD)"; export LD; \
LDFLAGS="$(STAGE1_LDFLAGS) $(LDFLAGS)"; export LDFLAGS; \
--
2.20.1
