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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/111936] std::stacktrace cannot be used in a shared
 library
Date: Tue, 24 Oct 2023 15:55:53 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: libstdc++
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: link-failure
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X-Bugzilla-Who: redi at gcc dot gnu.org
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111936

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Run autoreconf in the libstdc++-v3 dir, but you need the right versions of
automake and autoconf. The effect of doing that would be this additional pa=
tch,
which I didn't show (because it's just a generated file and our usual
convention is to not include changes to generated files in patches, because=
 it
can be regenerated):

--- a/libstdc++-v3/src/libbacktrace/Makefile.in
+++ b/libstdc++-v3/src/libbacktrace/Makefile.in
@@ -472,9 +472,10 @@ libstdc___libbacktrace_la_CPPFLAGS =3D \

 C_WARN_FLAGS =3D $(WARN_FLAGS) -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wno-unused-but-set-variable
 CXX_WARN_FLAGS =3D $(WARN_FLAGS) -Wno-unused-parameter
-AM_CFLAGS =3D $(C_WARN_FLAGS) $(EXTRA_CFLAGS)
-AM_CXXFLAGS =3D $(CXX_WARN_FLAGS) -fno-rtti -fno-exceptions \
-       $(EXTRA_CXXFLAGS)
+AM_CFLAGS =3D $(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \
+       $(C_WARN_FLAGS) $(EXTRA_CFLAGS)
+AM_CXXFLAGS =3D $(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \
+       $(CXX_WARN_FLAGS) -fno-rtti -fno-exceptions $(EXTRA_CXXFLAGS)
 obj_prefix =3D std_stacktrace

 # Each FILE.c in SOURCES will be compiled to SHORTNAME-FILE.o=