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libstdc++: use lt_host_flags for libstdc++.la

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For platforms like Mingw and Cygwin, cygwin refuses to generate the
shared library without using -no-undefined.

Attached patch makes sure the right flags are used, since libtool is
already used to link libstdc++.

libstdc++-v3/ChangeLog:

	* src/Makefile.am (libstdc___la_LINK): Add lt_host_flags.
	* src/Makefile.in: Regenerate.
This commit is contained in:
Jonathan Yong 2020-11-03 07:47:12 +00:00 • committed by Jonathan Wakely
parent 41f7f6178e
commit 08fca4df1d
2 changed files with 2 additions and 2 deletions
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2
libstdc++-v3/src/Makefile.am
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@ -110,7 +110,7 @@ libstdc___la_DEPENDENCIES = \
libstdc___la_LDFLAGS = \
-version-info $(libtool_VERSION) ${version_arg} -lm
libstdc___la_LINK = $(CXXLINK) $(libstdc___la_LDFLAGS)
libstdc___la_LINK = $(CXXLINK) $(libstdc___la_LDFLAGS) $(lt_host_flags)
# Use special rules for compatibility-ldbl.cc compilation, as we need to
# pass -mlong-double-64.

2
libstdc++-v3/src/Makefile.in
View file

@ -519,7 +519,7 @@ libstdc___la_DEPENDENCIES = \
libstdc___la_LDFLAGS = \
-version-info $(libtool_VERSION) ${version_arg} -lm
libstdc___la_LINK = $(CXXLINK) $(libstdc___la_LDFLAGS)
libstdc___la_LINK = $(CXXLINK) $(libstdc___la_LDFLAGS) $(lt_host_flags)
# A note on compatibility and static libraries.
#