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Darwin, crts: Build Darwin10 unwinder shim as a library. 

We have a small unwinder shim that is only used for Darwin10
(and only then in quite specific cases).  To avoid linking
this code for every executable or DSO, we can present the crt
as a convenience library (rather than a .o file).

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>

gcc/ChangeLog:

	* config/darwin.h (LINK_COMMAND_SPEC_A): Use Darwin10
	unwinder shim as a convenience library.

libgcc/ChangeLog:

	* config.host: Use convenience library for Darwin10
	unwinder shim.
	* config/t-darwin: Build Darwin10 unwinder shim as a
	convenience library.
This commit is contained in:
Iain Sandoe 2021-09-18 17:08:42 +01:00
parent f75b237254
commit 8738543878
3 changed files with 8 additions and 2 deletions
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2
gcc/config/darwin.h
View File

@ -231,7 +231,7 @@ extern GTY(()) int darwin_ms_struct;
%{%:sanitize(address): -lasan } \
%{%:sanitize(undefined): -lubsan } \
%(link_ssp) \
%:version-compare(>< 10.6 10.7 mmacosx-version-min= -ld10-uwfef.o) \
%:version-compare(>< 10.6 10.7 mmacosx-version-min= -ld10-uwfef) \
%(link_gcc_c_sequence) \
}}}\
%{!nostdlib:%{!r:%{!nostartfiles:%E}}} %{T*} %{F*} "\

2
libgcc/config.host
View File

@ -215,7 +215,7 @@ case ${host} in
*-*-darwin*)
asm_hidden_op=.private_extern
tmake_file="$tmake_file t-darwin ${cpu_type}/t-darwin t-libgcc-pic t-slibgcc-darwin"
extra_parts="crt3.o d10-uwfef.o crttms.o crttme.o"
extra_parts="crt3.o libd10-uwfef.a crttms.o crttme.o"
;;
*-*-dragonfly*)
tmake_file="$tmake_file t-crtstuff-pic t-libgcc-pic t-eh-dw2-dip"

6
libgcc/config/t-darwin
View File

@ -18,3 +18,9 @@ LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/config/unwind-dw2-fde-darwin.c \
# Patch to __Unwind_Find_Enclosing_Function for Darwin10.
d10-uwfef.o: $(srcdir)/config/darwin10-unwind-find-enc-func.c
$(crt_compile) -mmacosx-version-min=10.6 -c $<
# Using this crt as a library means that it will not be added to an exe
# (or module) unless needed.
libd10-uwfef.a: d10-uwfef.o
$(AR_CREATE_FOR_TARGET) $@ d10-uwfef.o
$(RANLIB_FOR_TARGET) $@