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freebsd-skq/lib/csu/Makefile.inc

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Enable GCC stack protection (aka Propolice) for userland: - It is opt-out for now so as to give it maximum testing, but it may be turned opt-in for stable branches depending on the consensus. You can turn it off with WITHOUT_SSP. - WITHOUT_SSP was previously used to disable the build of GNU libssp. It is harmless to steal the knob as SSP symbols have been provided by libc for a long time, GNU libssp should not have been much used. - SSP is disabled in a few corners such as system bootstrap programs (sys/boot), process bootstrap code (rtld, csu) and SSP symbols themselves. - It should be safe to use -fstack-protector-all to build world, however libc will be automatically downgraded to -fstack-protector because it breaks rtld otherwise. - This option is unavailable on ia64. Enable GCC stack protection (aka Propolice) for kernel: - It is opt-out for now so as to give it maximum testing. - Do not compile your kernel with -fstack-protector-all, it won't work. Submitted by: Jeremie Le Hen <jeremie@le-hen.org>
2008-06-25 21:33:28 +00:00
# $FreeBSD$
Fix build when WITH_SSP is set explicitly. Submitted by: Jeremie Le Hen
2009-02-21 15:04:31 +00:00
SSP_CFLAGS=
Build lib/ with WARNS=6 by default. Similar to libexec/, do the same with lib/. Make WARNS=6 the norm and lower it when needed. I'm setting WARNS?=0 for secure/. It seems secure/ includes the Makefile.inc provided by lib/. I'm not going to touch that directory. Most of the code there is contributed anyway.
2010-01-02 09:58:07 +00:00
Add the Clang specific -Wmissing-variable-declarations to WARNS=6. This compiler flag enforces that that people either mark variables static or use an external declarations for the variable, similar to how -Wmissing-prototypes works for functions. Due to the fact that Yacc/Lex generate code that cannot trivially be changed to not warn because of this (lots of yy* variables), add a NO_WMISSING_VARIABLE_DECLARATIONS that can be used to turn off this specific compiler warning. Announced on: toolchain@
2013-04-19 19:45:00 +00:00
NO_WMISSING_VARIABLE_DECLARATIONS=
Implement a BSD licensed crtbegin/crtend These are needed for .ctors/.dtors and .jcr handling. The former needs all the function pointers to be called in the correct order from the .init/.fini section. The latter just needs to call a gcj specific function if it exists with a pointer to the start of the .jcr section. This is currently disabled until __dso_handle support is added. Reviewed by: emaste MFC after: 1 month Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D17587
2018-10-25 17:39:41 +00:00
.include <src.opts.mk>
retire BSD_CRTBEGIN option BSD crt is currently used on all architectures (other than sparc64). Remove the option and use BSD crt everywhere as part of the GCC 4.2.1 retirement plan. https://lists.freebsd.org/pipermail/freebsd-arch/2020-January/019823.html PR: 239851 Reviewed by: andrew, brooks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D23122
2020-01-31 18:04:04 +00:00
.if !defined(BUILDING_TESTS)
Implement a BSD licensed crtbegin/crtend These are needed for .ctors/.dtors and .jcr handling. The former needs all the function pointers to be called in the correct order from the .init/.fini section. The latter just needs to call a gcj specific function if it exists with a pointer to the start of the .jcr section. This is currently disabled until __dso_handle support is added. Reviewed by: emaste MFC after: 1 month Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D17587
2018-10-25 17:39:41 +00:00
OBJS+= crtbegin.o crtbeginS.o crtbeginT.o
OBJS+= crtend.o crtendS.o
Remove the sed hack for ABI tag notes. The ELF notes compiled in C were placed in a section with the wrong type (SHT_PROGBITS instead of SHT_NOTE). Previously, sed was used on the generated assembly to rewrite the section type. Instead, write the notes in assembly which permits setting the correct section type directly. While here, move inline assembly entry points out of C and into assembly for aarch64, arm, and riscv. Reviewed by: kib Tested on: amd64 (cirrus-ci), riscv64 Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D25211
2020-06-15 19:38:48 +00:00
ACFLAGS+= -DLOCORE
Use -fno-asynchronous-unwind-tables to compile lib/csu Summary: In r209294 kib added -fno-asynchronous-unwind-tables to the compile flags for the GNU C startup components. This was done to work around a BFD ld assertion, "no .eh_frame_hdr table will be created", which is produced because of the layout of the startup objects. Add the same flag to lib/csu too, for the same reason. And similarly to r209294, also add -fno-omit-frame-pointer. This is primarily meant to quickly MFC to stable/11, so it can end up in the 11.4 release, as a fix for https://bugs.freebsd.org/246322. PR: 246322 MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D24797
2020-05-11 19:36:38 +00:00
CFLAGS+= -fno-asynchronous-unwind-tables
CFLAGS+= -fno-omit-frame-pointer
Implement a BSD licensed crtbegin/crtend These are needed for .ctors/.dtors and .jcr handling. The former needs all the function pointers to be called in the correct order from the .init/.fini section. The latter just needs to call a gcj specific function if it exists with a pointer to the start of the .jcr section. This is currently disabled until __dso_handle support is added. Reviewed by: emaste MFC after: 1 month Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D17587
2018-10-25 17:39:41 +00:00
CFLAGS_CRTS= -DSHARED ${PICFLAG}
crtbegin.o: crtbegin.c
crtbeginS.o: crtbegin.c
crtbeginT.o: crtbegin.c
crtend.o: crtend.c
crtendS.o: crtend.c
crtbegin.o crtend.o crtbeginT.o:
Support reading in .depend files. This is for an upcoming change that fixes .depend handling in here. It will cause some duplicate sources which need to be trimmed out. MFC after: 2 weeks Sponsored by: DellEMC
2019-06-15 17:08:32 +00:00
${CC} ${CFLAGS} -I${.CURDIR} -c -o ${.TARGET} ${.ALLSRC:N*.h:[1]}
Implement a BSD licensed crtbegin/crtend These are needed for .ctors/.dtors and .jcr handling. The former needs all the function pointers to be called in the correct order from the .init/.fini section. The latter just needs to call a gcj specific function if it exists with a pointer to the start of the .jcr section. This is currently disabled until __dso_handle support is added. Reviewed by: emaste MFC after: 1 month Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D17587
2018-10-25 17:39:41 +00:00
crtbeginS.o crtendS.o:
Support reading in .depend files. This is for an upcoming change that fixes .depend handling in here. It will cause some duplicate sources which need to be trimmed out. MFC after: 2 weeks Sponsored by: DellEMC
2019-06-15 17:08:32 +00:00
${CC} ${CFLAGS} -I${.CURDIR} ${CFLAGS_CRTS} -c -o ${.TARGET} \
${.ALLSRC:N*.h:[1]}
Implement a BSD licensed crtbegin/crtend These are needed for .ctors/.dtors and .jcr handling. The former needs all the function pointers to be called in the correct order from the .init/.fini section. The latter just needs to call a gcj specific function if it exists with a pointer to the start of the .jcr section. This is currently disabled until __dso_handle support is added. Reviewed by: emaste MFC after: 1 month Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D17587
2018-10-25 17:39:41 +00:00
.endif
Use default WARNS setting (of 6) for lib/csu. PR: bin/140089 Reviewed by: jmallett Approved by: ed (co-mentor)
2010-03-05 13:29:05 +00:00
.include "../Makefile.inc"
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