klibc - Oct 2019 - [klibc:master] Fix missing header dependency for sigsuspend.o

Commit-ID:  5b7689f66c4476432ebe8fe8a88ea9fdeaa4eba8
Gitweb:    
http://git.kernel.org/?p=libs/klibc/klibc.git;a=commit;h=5b7689f66c4476432ebe8fe8a88ea9fdeaa4eba8
Author:     Ben Hutchings <ben at decadent.org.uk>
AuthorDate: Mon, 7 Oct 2019 16:49:35 +0100
Committer:  Ben Hutchings <ben at decadent.org.uk>
CommitDate: Mon, 7 Oct 2019 17:25:17 +0100

[klibc] Fix missing header dependency for sigsuspend.o

sigsuspend.c includes <klibc/havesyscall.h>, which is a generated
file.  In a parallel make, sigsuspend.o might currently be built
before havesyscall.h, and to avoid this we need t add an explicit
dependency.

Given that they are built from different makefiles, I don't think a
direct dependency will work.  Instead, add syscalls/klib.list as a
dependency for sigsuspend.o so that it indirectly depends on
everything that's built from syscalls/.

Reported-by: Matthias Klose <doko at ubuntu.com>
Reported-by: Thorsten Glaser <tg at mirbsd.de>
References: https://bugs.launchpad.net/ubuntu/+source/klibc/+bug/1843743
Signed-off-by: Ben Hutchings <ben at decadent.org.uk>

---
 usr/klibc/Kbuild | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/usr/klibc/Kbuild b/usr/klibc/Kbuild
index 526442dc..b462fbec 100644
--- a/usr/klibc/Kbuild
+++ b/usr/klibc/Kbuild
@@ -83,6 +83,10 @@ ifeq ($(CONFIG_KLIBC_ERRLIST),y)
 KLIBCCFLAGS_strerror.o += -DWITH_ERRLIST
 endif
 
+# sigsuspend.c includes <klibc/havesyscall.h> generated by syscalls/
+# build, so require that to build first
+$(obj)/sigsuspend.o: $(obj)/syscalls/klib.list
+
 #####
 # Shared definitions
 LIBC     := libc.a