1# $FreeBSD$
2# This makefiles adds the necessary libc dependencies for RTLD without pulling
3# in all of the complex libc bits such as locales, etc.
4
5.include <bsd.compiler.mk>
6
7LIBC_SRCTOP=${SRCTOP}/lib/libc
8.if exists(${LIBC_SRCTOP}/${MACHINE_ARCH:S/powerpc64le/powerpc64/})
9LIBC_ARCH=${MACHINE_ARCH:S/powerpc64le/powerpc64/}
10.else
11LIBC_ARCH=${MACHINE_CPUARCH}
12.endif
13
14CFLAGS+=	-I${SRCTOP}/libexec/rtld-elf/rtld-libc
15
16# Build all the libc files that use interposed symbols or pthreads again for
17# RTLD. We compile with a different libc_private.h and namespace.h that
18# redirects all calls to interposed functions to use the non-interposed version
19# instead.
20.PATH: ${LIBC_SRCTOP}/gen
21SRCS+=	opendir.c closedir.c readdir.c telldir.c
22
23# Avoid further dependencies by providing simple implementations of libc
24# functions such as __error(), etc.
25.PATH: ${SRCTOP}/libexec/rtld-elf/rtld-libc
26SRCS+=	rtld_libc.c
27
28# Now build the remaining files from libc:
29.PATH: ${LIBC_SRCTOP}/stdlib
30SRCS+=	reallocf.c realpath.c merge.c reallocarray.c
31# TODO: fix merge.c to build with WARNS=6
32.if ${COMPILER_TYPE} == "clang"
33CFLAGS.merge.c+=-Wno-error=null-pointer-arithmetic
34.endif
35.PATH: ${LIBC_SRCTOP}/gen
36SRCS+=	errlst.c getcwd.c getprogname.c raise.c sigsetops.c sysctlnametomib.c \
37    __xuname.c
38# errlst.c needs the errlst.h header from libc:
39CFLAGS.errlst.c+=-I${LIBC_SRCTOP}/include
40
41# use generic versions of string functions to avoid potential ifunc dispatch
42.PATH: ${LIBC_SRCTOP}/string
43SRCS+=	bcopy.c bzero.c memchr.c memcmp.c memcpy.c memmove.c memset.c strcat.c \
44    strchr.c strchrnul.c strcmp.c strcpy.c strcspn.c strdup.c strlcat.c \
45    strlcpy.c strlen.c strncmp.c strncpy.c strrchr.c strsep.c strspn.c \
46    strstr.c strtok.c
47CFLAGS.memchr.c+=-Wno-cast-qual
48CFLAGS.strchr.c+=-Wno-cast-qual
49CFLAGS.strchrnul.c+=-Wno-cast-qual
50CFLAGS.strcspn.c+=-Wno-sign-compare
51CFLAGS.strrchr.c+=-Wno-cast-qual
52CFLAGS.strspn.c+=-Wno-sign-compare
53CFLAGS.strstr.c+=-Wno-cast-qual -Wno-sign-compare
54CFLAGS.strtok.c+=-Wno-cast-qual
55
56# Also use all the syscall .o files from libc_nossp_pic:
57_libc_other_objects= sigsetjmp lstat stat fstat fstatat fstatfs syscall \
58    cerror geteuid getegid sigfastblock munmap mprotect \
59    sysarch __sysctl issetugid __getcwd utrace getpid \
60    thr_self thr_kill pread mmap lseek _exit _fstat _fstatat _fstatfs \
61    getdirentries _getdirentries _close _fcntl _open _openat _read \
62    _sigprocmask _write readlink __realpathat _setjmp setjmp setjmperr
63
64
65# Finally add additional architecture-dependent libc dependencies
66.if ${LIBC_ARCH} == "arm"
67# ARM needs aeabi_unwind_cpp for _setjmp
68_libc_other_objects+=aeabi_unwind_cpp
69.elif ${LIBC_ARCH} == "i386"
70# i386 needs i386_set_gsbase for allocate_initial_tls()
71_libc_other_objects+=i386_set_gsbase
72.elif ${LIBC_ARCH} == "powerpc" || ${LIBC_ARCH} == "powerpcspe"
73# ppc needs __syncicache and abs for reloc.c
74_libc_other_objects+=syncicache abs
75.elif ${LIBC_ARCH} == "powerpc64"
76# ppc64 needs __syncicache for reloc.c
77_libc_other_objects+=syncicache
78.endif
79
80# Extract all the .o files from libc_nossp_pic.a. This ensures that
81# we don't accidentally pull in the interposing table or similar by linking
82# directly against libc_nossp_pic.a
83_rtld_libc_objs=
84.for _obj in ${_libc_other_objects}
85_rtld_libc_objs+=${_obj}.nossppico
86CLEANFILES+=${_obj}.nossppico
87# LDFLAGS+=	-Wl,--trace-symbol=${_obj}
88.endfor
89# LDFLAGS+=	-Wl,--trace
90
91# We insert all the .o files from libc_nossp_pic.a into a new rtld_libc.a file
92# to ensure that only .o files that are actually used end up being included.
93rtld_libc.a: ${LIBC_NOSSP_PIC} ${SRCTOP}/libexec/rtld-elf/rtld-libc/Makefile.inc
94	@rm -f ${.TARGET}
95	${AR} x ${LIBC_NOSSP_PIC} ${_rtld_libc_objs}
96	${AR} cr ${.TARGET} ${_rtld_libc_objs}
97CLEANFILES+=rtld_libc.a
98LDADD+=${.OBJDIR}/rtld_libc.a
99beforelinking: rtld_libc.a
100