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libgcc, Darwin: Drop the legacy library build for macOS >= 15 [PR116809].

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We have been building a legacy libgcc_s.1 DSO to support code that
was built with older compilers.

From macOS 15,  the unwinder no longer exports some of the symbols used
in that library which (a) cuases bootstrap fail and (b) means that the
legacy library is no longer useful.

No open branch of GCC emits references to this library - and any already
-built code that depends on the symbols would need rework anyway.

	PR target/116809

libgcc/ChangeLog:

	* config.host: Build legacy libgcc_s.1 on hosts before macOS 15.
	* config/i386/t-darwin: Remove reference to legacy libgcc_s.1
	* config/rs6000/t-darwin: Likewise.
	* config/t-darwin-libgccs1: New file.

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
This commit is contained in:
Iain Sandoe 2024-09-22 11:43:32 +01:00
parent dab4500215
commit d9cafa0c4f
4 changed files with 10 additions and 10 deletions
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11
libgcc/config.host
View File

@ -239,22 +239,25 @@ case ${host} in
esac
tmake_file="$tmake_file t-slibgcc-darwin"
case ${host} in
x86_64-*-darwin2[0-3]*)
tmake_file="t-darwin-min-11 t-darwin-libgccs1 $tmake_file"
;;
*-*-darwin2*)
tmake_file="t-darwin-min-11 $tmake_file"
;;
*-*-darwin1[89]*)
tmake_file="t-darwin-min-8 $tmake_file"
tmake_file="t-darwin-min-8 t-darwin-libgccs1 $tmake_file"
;;
*-*-darwin9* | *-*-darwin1[0-7]*)
tmake_file="t-darwin-min-5 $tmake_file"
tmake_file="t-darwin-min-5 t-darwin-libgccs1 $tmake_file"
;;
*-*-darwin[4-8]*)
tmake_file="t-darwin-min-1 $tmake_file"
tmake_file="t-darwin-min-1 t-darwin-libgccs1 $tmake_file"
;;
*)
# Fall back to configuring for the oldest system known to work with
# all archs and the current sources.
tmake_file="t-darwin-min-5 $tmake_file"
tmake_file="t-darwin-min-5 t-darwin-libgccs1 $tmake_file"
echo "Warning: libgcc configured to support macOS 10.5" 1>&2
;;
esac

3
libgcc/config/i386/t-darwin
View File

@ -4,6 +4,3 @@ LIB2FUNCS_EXCLUDE = _fixtfdi _fixunstfdi _floatditf _floatunditf
# Extra symbols for this port.
SHLIB_MAPFILES += $(srcdir)/config/i386/libgcc-darwin.ver
# Build a legacy libgcc_s.1
BUILD_LIBGCCS1 = YES

3
libgcc/config/rs6000/t-darwin
View File

@ -56,6 +56,3 @@ unwind-dw2_s.o: HOST_LIBGCC2_CFLAGS += -maltivec
unwind-dw2.o: HOST_LIBGCC2_CFLAGS += -maltivec
LIB2ADDEH += $(srcdir)/config/rs6000/darwin-fallback.c
# Build a legacy libgcc_s.1
BUILD_LIBGCCS1 = YES

3
libgcc/config/t-darwin-libgccs1 Normal file
View File

@ -0,0 +1,3 @@
# Build a legacy libgcc_s.1
BUILD_LIBGCCS1 = YES