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Stop building with the standard system headers.

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Building with the standard system headers isn't a perfect match to the
stand environment. Instead, copy over the files we know are safe to
use and constrain what else is used. We use -nostdinc to achieve this.

This also fixes issues with building 32-bit libraries on amd64
sometimes pulling in the wrong cpufunc.h giving an error now that we
stop on errors. It will also enable an easier transition to lua boot.

Sponsored by: Netflix
This commit is contained in:
Warner Losh 2017-12-05 21:38:19 +00:00
parent 253d60eecc
commit 05f37f4d86
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=326593
2 changed files with 29 additions and 0 deletions
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6
stand/defs.mk
View File

@ -41,6 +41,12 @@ LIBSA32= ${BOOTOBJ}/libsa32/libsa32.a
.endif
# Standard options:
CFLAGS+= -nostdinc
.if ${MACHINE_ARCH} == "amd64" && ${DO32:U0} == 1
CFLAGS+= -I${BOOTOBJ}/libsa32
.else
CFLAGS+= -I${BOOTOBJ}/libsa
.endif
CFLAGS+= -I${SASRC} -D_STANDALONE
CFLAGS+= -I${SYSDIR}

23
stand/libsa/Makefile
View File

@ -91,6 +91,7 @@ SRCS+= libsa_bzlib_private.h
.for file in bzlib.c crctable.c decompress.c huffman.c randtable.c
SRCS+= _${file}
CLEANFILES+= _${file}
CFLAGS._${file}+=-I${SRCTOP}/contrib/bzip2
_${file}: ${file}
sed "s|bzlib_private\.h|libsa_bzlib_private.h|" \
@ -129,6 +130,26 @@ libsa_${file}: ${file}
${.ALLSRC} > ${.TARGET}
.endfor
# Create a subset of includes that are safe, as well as adjusting those that aren't
# The lists may drive people nuts, but they are explicitly opt-in
beforedepend:
echo beforedepend; \
mkdir -p xlocale arpa; \
for i in a.out.h assert.h elf.h limits.h nlist.h setjmp.h stddef.h stdbool.h string.h strings.h time.h unistd.h uuid.h; do \
ln -sf ${SRCTOP}/include/$$i $$i; \
done; \
ln -sf ${SYSDIR}/${MACHINE}/include/stdarg.h stdarg.h; \
ln -sf ${SYSDIR}/sys/errno.h errno.h; \
ln -sf ${SYSDIR}/sys/stdint.h stdint.h; \
ln -sf ${SRCTOP}/include/arpa/inet.h arpa/inet.h; \
ln -sf ${SRCTOP}/include/arpa/tftp.h arpa/tftp.h; \
for i in _time.h _strings.h _string.h; do \
[ -f xlocale/$$i ] || cp /dev/null xlocale/$$i; \
done; \
for i in ctype.h stdio.h stdlib.h; do \
ln -sf ${SASRC}/stand.h $$i; \
done
# io routines
SRCS+= closeall.c dev.c ioctl.c nullfs.c stat.c \
fstat.c close.c lseek.c open.c read.c write.c readdir.c
@ -148,6 +169,8 @@ SRCS+= pkgfs.c
SRCS+= nandfs.c
.endif
CFLAGS.bzipfs.c+= -I${SRCTOP}/contrib/bzip2
# explicit_bzero
.PATH: ${SYSDIR}/libkern
SRCS+= explicit_bzero.c