Commit 251a3c19cb "sleep: employ __USE_EXTERN_INLINES (with necessary fixes)" introduces following problems: 1. __USE_EXTERN_INLINES forcibly enabled build fails ... LD libuClibc-1.0.15.so libc/libc_so.a(cmsg_nxthdr.os): In function `__GI___cmsg_nxthdr': cmsg_nxthdr.c:(.text.__GI___cmsg_nxthdr+0x0): multiple definition of `__GI___cmsg_nxthdr' libc/libc_so.a(close.os):close.c:(.text.__GI___cmsg_nxthdr+0x0): first defined here libc/libc_so.a(creat.os): In function `__GI___cmsg_nxthdr': creat.c:(.text.__GI___cmsg_nxthdr+0x0): multiple definition of `__GI___cmsg_nxthdr' libc/libc_so.a(close.os):close.c:(.text.__GI___cmsg_nxthdr+0x0): first defined here ... 2. libuargp wrongly contains __cmsg_nxthdr/__sigismember/__sigdelset/__sigaddset global symbols on platforms which includes signal.h from sys/procfs.h As result, static linking will fail: TEST_LINK argp/ bug-argp1 /home/wbx/ppc-static/target_qemu-ppc-macppc_uclibc-ng_hard/usr/lib/libc.a(sigsetops.os): In function `__GI___sigismember': sigsetops.c:(.text+0x0): multiple definition of `__sigismember' /home/wbx/ppc-static/target_qemu-ppc-macppc_uclibc-ng_hard/usr/lib/libuargp.a(argp-xinl.os):argp-xinl.c:(.text+0x0): first defined here /home/wbx/ppc-static/target_qemu-ppc-macppc_uclibc-ng_hard/usr/lib/libc.a(sigsetops.os): In function `__GI___sigaddset': sigsetops.c:(.text+0x28): multiple definition of `__sigaddset' /home/wbx/ppc-static/target_qemu-ppc-macppc_uclibc-ng_hard/usr/lib/libuargp.a(argp-xinl.os):argp-xinl.c:(.text+0x28): first defined here /home/wbx/ppc-static/target_qemu-ppc-macppc_uclibc-ng_hard/usr/lib/libc.a(sigsetops.os): In function `__GI___sigdelset': sigsetops.c:(.text+0x4c): multiple definition of `__sigdelset' /home/wbx/ppc-static/target_qemu-ppc-macppc_uclibc-ng_hard/usr/lib/libuargp.a(argp-xinl.os):argp-xinl.c:(.text+0x4c): first defined here We have to partially revert 251a3c19cb to fix problems above. It is safe to do this after commit 162cfaea20 *: inline constant __sig{add,del}set and __sigismember since we are able to use new inlines from within libc and leave the rest of world(__USE_EXTERN_INLINES) equal to glibc now. Signed-off-by: Leonid Lisovskiy &lt;lly.dev(a)gmail.com&gt; --- libc/signal/sigsetops.c | 2 +- libc/sysdeps/linux/common/bits/sigset.h | 14 ++++---------- 2 files changed, 5 insertions(+), 11 deletions(-) diff --git a/libc/signal/sigsetops.c b/libc/signal/sigsetops.c index fa5fe6a..da5803e 100644 --- a/libc/signal/sigsetops.c +++ b/libc/signal/sigsetops.c @@ -3,7 +3,7 @@ #include <features.h> -#define __PROVIDE_OUT_OF_LINE_SIGSETFN +#define _EXTERN_INLINE #ifndef __USE_EXTERN_INLINES # define __USE_EXTERN_INLINES 1 #endif diff --git a/libc/sysdeps/linux/common/bits/sigset.h b/libc/sysdeps/linux/common/bits/sigset.h index f220e81..2c9fe74 100644 --- a/libc/sysdeps/linux/common/bits/sigset.h +++ b/libc/sysdeps/linux/common/bits/sigset.h @@ -52,6 +52,10 @@ typedef struct { #if !defined _SIGSET_H_fns && defined _SIGNAL_H # define _SIGSET_H_fns 1 +# ifndef _EXTERN_INLINE +# define _EXTERN_INLINE __extern_inline +# endif + /* Return a mask that includes the bit for SIG only. */ /* Unsigned cast ensures shift/mask insns are used. */ # define __sigmask(sig) \ @@ -151,24 +155,14 @@ typedef struct { /* These functions needn't check for a bogus signal number -- error checking is done in the non __ versions. */ -# if !defined __USE_EXTERN_INLINES || defined __PROVIDE_OUT_OF_LINE_SIGSETFN extern int __sigismember (const __sigset_t *, int); libc_hidden_proto(__sigismember) extern void __sigaddset (__sigset_t *, int); libc_hidden_proto(__sigaddset) extern void __sigdelset (__sigset_t *, int); libc_hidden_proto(__sigdelset) -# endif # ifdef __USE_EXTERN_INLINES -# undef _EXTERN_INLINE -# ifdef __PROVIDE_OUT_OF_LINE_SIGSETFN -# define _EXTERN_INLINE -# else /* normal case */ - /* dropped extern below: otherwise every module with __USE_EXTERN_INLINES - * will have its own copy of out-of line function emitted. */ -# define _EXTERN_INLINE /*extern*/ __always_inline -# endif # define __SIGSETFN(RET_TYPE, NAME, BODY, CONST) \ _EXTERN_INLINE RET_TYPE \ NAME (CONST __sigset_t *__set, int __sig) \ -- 1.8.5.6