Thomas Richter 1ce6a9fc15 bpf: fix build error in libbpf with EXTRA_CFLAGS="-Wp, -D_FORTIFY_SOURCE=2 -O2" ... Commit 531b014e7a ("tools: bpf: make use of reallocarray") causes a compiler error when building the perf tool in the linux-next tree. Compile file tools/lib/bpf/libbpf.c on a FEDORA 28 installation with gcc compiler version: gcc (GCC) 8.0.1 20180324 (Red Hat 8.0.1-0.20) shows this error message: [root@p23lp27] # make V=1 EXTRA_CFLAGS="-Wp,-D_FORTIFY_SOURCE=2 -O2" [...] make -f /home6/tmricht/linux-next/tools/build/Makefile.build dir=./util/scripting-engines obj=libperf libbpf.c: In function ‘bpf_object__elf_collect’: libbpf.c:811:15: error: ignoring return value of ‘strerror_r’, declared with attribute warn_unused_result [-Werror=unused-result] strerror_r(-err, errmsg, sizeof(errmsg)); ^ cc1: all warnings being treated as errors mv: cannot stat './.libbpf.o.tmp': No such file or directory /home6/tmricht/linux-next/tools/build/Makefile.build:96: recipe for target 'libbpf.o' failed Replace all occurrences of strerror() by calls to strerror_r(). To keep the compiler quiet also use the return value from strerror_r() otherwise a 'variable set but not use' warning which is treated as error terminates the compile. Fixes: 531b014e7a ("tools: bpf: make use of reallocarray") Suggested-by: Jakub Kicinski <jakub.kicinski@netronome.com> Suggested-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>		2018-07-31 02:08:55 +02:00
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accounting	…
arch	tools/headers: Pick up latest kernel ABIs	2018-06-26 08:43:14 +02:00
bpf	tools/bpftool: ignore build products	2018-07-26 02:50:26 +02:00
build	Merge ra.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux	2018-07-20 21:17:12 -07:00
cgroup	…
firewire	…
gpio	…
hv	…
iio	…
include	bpf: Sync bpf.h to tools/	2018-07-15 00:08:41 +02:00
kvm/kvm_stat	…
laptop	…
leds	…
lib	bpf: fix build error in libbpf with EXTRA_CFLAGS="-Wp, -D_FORTIFY_SOURCE=2 -O2"	2018-07-31 02:08:55 +02:00
memory-model	…
nfsd	…
objtool	objtool: Support GCC 8 '-fnoreorder-functions'	2018-07-02 09:42:11 +02:00
pci	…
pcmcia	…
perf	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-07-13 13:33:09 -07:00
power	Merge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux	2018-06-21 00:37:04 +02:00
scripts	…
spi	…
testing	bpf: Add Python 3 support to selftests scripts for bpf	2018-07-25 07:46:48 +02:00
thermal/tmon	…
time	…
usb	…
virtio	sg: remove ->sg_magic member	2018-06-29 08:48:06 -06:00
vm	mm: mark pages in use for page tables	2018-06-07 17:34:37 -07:00
wmi	…
Makefile	…