5944f899a2
On most architectures crt objects are compiled in a multiple-step process so that sed can be run on the generated assembly. As the final step, the C compiler generates an object file from the modified assembly output. Currently this last step uses $CC with only $ACFLAGS. However, for other uses in the tree, $ACFLAGS is meant to include assembly-specific compiler flags that are in addition to $CFLAGS (see default .S.o rules bsd.suffixes.mk). In particular, external toolchains may require additional flags to select a non-default target which will be present in CFLAGS but not ACFLAGS. To support this while still mitigating the issue with CFLAGS described in r234502, include a modified CFLAGS that excludes "-g" when assembling the modified assembly files. Note that normally an assembler ($AS) is used to assemble .s flags to object files (see bsd.suffixes.mk). However, llvm-based toolchains do not currently have a stand-alone assembler. Reviewed by: imp Sponsored by: DARPA / AFRL Differential Revision: https://reviews.freebsd.org/D10085
58 lines
1.5 KiB
Makefile
58 lines
1.5 KiB
Makefile
# $FreeBSD$
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.PATH: ${.CURDIR:H}/common
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SRCS= crti.S crtn.S
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OBJS= ${SRCS:N*.h:R:S/$/.o/g}
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OBJS+= gcrt1.o crt1.o Scrt1.o
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CFLAGS+= -I${.CURDIR:H}/common \
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-I${SRCTOP}/lib/libc/include
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FILES= ${OBJS}
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FILESMODE= ${LIBMODE}
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FILESOWN= ${LIBOWN}
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FILESGRP= ${LIBGRP}
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FILESDIR= ${LIBDIR}
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# These FILES qualify as libraries for the purpose of LIBRARIES_ONLY.
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.undef LIBRARIES_ONLY
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CLEANFILES= ${OBJS} crt1_c.o crt1_s.o gcrt1_c.o Scrt1_c.o
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CLEANFILES+= crt1_c.s gcrt1_c.s Scrt1_c.s
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# See the comment in lib/csu/common/crtbrand.c for the reason crt1_c.c is not
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# directly compiled to .o files.
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gcrt1_c.s: crt1_c.c
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${CC} ${CFLAGS} -DGCRT -S -o ${.TARGET} ${.CURDIR}/crt1_c.c
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sed ${SED_FIX_NOTE} ${.TARGET}
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gcrt1_c.o: gcrt1_c.s
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${CC} ${CFLAGS:N-g} ${ACFLAGS} -c -o ${.TARGET} gcrt1_c.s
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gcrt1.o: gcrt1_c.o crt1_s.o
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${LD} ${_LDFLAGS} -o gcrt1.o -r crt1_s.o gcrt1_c.o
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crt1_c.s: crt1_c.c
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${CC} ${CFLAGS} -S -o ${.TARGET} ${.CURDIR}/crt1_c.c
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sed ${SED_FIX_NOTE} ${.TARGET}
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crt1_c.o: crt1_c.s
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${CC} ${CFLAGS:N-g} ${ACFLAGS} -c -o ${.TARGET} crt1_c.s
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crt1.o: crt1_c.o crt1_s.o
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${LD} ${_LDFLAGS} -o crt1.o -r crt1_s.o crt1_c.o
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${OBJCOPY} --localize-symbol _start1 crt1.o
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Scrt1_c.s: crt1_c.c
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${CC} ${CFLAGS} -fPIC -DPIC -S -o ${.TARGET} ${.CURDIR}/crt1_c.c
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sed ${SED_FIX_NOTE} ${.TARGET}
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Scrt1_c.o: Scrt1_c.s
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${CC} ${CFLAGS:N-g} ${ACFLAGS} -c -o ${.TARGET} Scrt1_c.s
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Scrt1.o: Scrt1_c.o crt1_s.o
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${LD} ${_LDFLAGS} -o Scrt1.o -r crt1_s.o Scrt1_c.o
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${OBJCOPY} --localize-symbol _start1 Scrt1.o
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.include <bsd.lib.mk>
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