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Commit2f51f42

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MinGW: Use -static-libgcc when linking a DLL.
When commit846e91e switched the linkerdriver from dlltool/dllwrap to gcc, it became possible for linking tochoose shared libgcc. Backends having loaded a module dynamicallylinked to libgcc can exit abnormally, which the postmaster treats like acrash. Resume use of static libgcc exclusively, like 9.3 and earlier.Back-patch to 9.4.
1 parent9e02e20 commit2f51f42

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2 files changed

+9
-3
lines changed

2 files changed

+9
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‎src/Makefile.shlib

Lines changed: 8 additions & 2 deletions
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@@ -375,16 +375,22 @@ else
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$(stlib): $(shlib) ;
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# XXX A backend that loads a module linked with libgcc_s_dw2-1.dll will exit
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# uncleanly, hence -static-libgcc. (Last verified with MinGW-w64 compilers
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# from i686-4.9.1-release-win32-dwarf-rt_v3-rev1.) Shared libgcc has better
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# support for C++/Java exceptions; while core PostgreSQL does not use them, it
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# would be nice to support shared libgcc for the benefit of extensions.
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#
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# If SHLIB_EXPORTS is set, the rules below will build a .def file from that.
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# Else we just use --export-all-symbols.
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ifeq (,$(SHLIB_EXPORTS))
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$(shlib): $(OBJS) | $(SHLIB_PREREQS)
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$(CC) $(CFLAGS) -shared -o $@ $(OBJS) $(LDFLAGS) $(LDFLAGS_SL) $(SHLIB_LINK) $(LIBS) -Wl,--export-all-symbols -Wl,--out-implib=$(stlib)
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$(CC) $(CFLAGS) -shared -static-libgcc -o $@ $(OBJS) $(LDFLAGS) $(LDFLAGS_SL) $(SHLIB_LINK) $(LIBS) -Wl,--export-all-symbols -Wl,--out-implib=$(stlib)
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else
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DLL_DEFFILE = lib$(NAME)dll.def
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$(shlib): $(OBJS) $(DLL_DEFFILE) | $(SHLIB_PREREQS)
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$(CC) $(CFLAGS) -shared -o $@ $(OBJS) $(DLL_DEFFILE) $(LDFLAGS) $(LDFLAGS_SL) $(SHLIB_LINK) $(LIBS) -Wl,--out-implib=$(stlib)
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$(CC) $(CFLAGS) -shared -static-libgcc -o $@ $(OBJS) $(DLL_DEFFILE) $(LDFLAGS) $(LDFLAGS_SL) $(SHLIB_LINK) $(LIBS) -Wl,--out-implib=$(stlib)
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endif
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endif # PORTNAME == cgywin

‎src/makefiles/Makefile.win32

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -72,4 +72,4 @@ win32ver.o: win32ver.rc
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# Rule for building a shared library from a single .o file
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%.dll: %.o
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$(CC) $(CFLAGS) -shared -o $@ $< -Wl,--export-all-symbols $(LDFLAGS) $(LDFLAGS_SL) $(BE_DLLLIBS)
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$(CC) $(CFLAGS) -shared -static-libgcc -o $@ $< -Wl,--export-all-symbols $(LDFLAGS) $(LDFLAGS_SL) $(BE_DLLLIBS)

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