Bug#1066543: ucx: FTBFS: cc1plus: error: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++ [-Werror]

[Andrey Rakhmatullin]

On Wed, Mar 13, 2024 at 12:57:48PM +0100, Lucas Nussbaum wrote:
> > libtool: compile:  g++ -DHAVE_CONFIG_H -I. -I../../../.. -DCPU_FLAGS= -I/<<PKGBUILDDIR>>/src -I/<<PKGBUILDDIR>> -I/<<PKGBUILDDIR>>/src -I/usr/include/hsa -I/usr/include/hip -O3 -g -Wall -Werror -funwind-tables -Wno-missing-field-initializers -Wno-unused-parameter -Wno-unused-label -Wno-long-long -Wno-endif-labels -Wno-sign-compare -Wno-multichar -Wno-deprecated-declarations -Winvalid-pch -fopenmp -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -nostdlib -std=c++11 -c ucp_tests.cc  -fPIC -DPIC -o .libs/libucxperf_la-ucp_tests.o
> > cc1plus: error: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++ [-Werror]
> > cc1plus: error: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++ [-Werror]
Two notes here after a local sbuild build.

First, these are warnings, not errors. Not sure what's the difference, it
also has -Werror passed and gcc is also 13.2.0-18, but I don't see the
"all warnings being treated as errors" text. The command:
libtool: compile:  g++ -DHAVE_CONFIG_H -I. -I../../../.. -DCPU_FLAGS= -I/<<PKGBUILDDIR>>/src -I/<<PKGBUILDDIR>> -I/<<PKGBUILDDIR>>/src -I/usr/include/hsa -I/usr/include/hip -O3 -g -Wall -Werror -funwind-tables -Wno-missing-field-initializers -Wno-unused-parameter -Wno-unused-label -Wno-long-long -Wno-endif-labels -Wno-sign-compare -Wno-multichar -Wno-deprecated-declarations -Winvalid-pch -fopenmp -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -nostdlib -std=c++11 -c ucp_tests.cc  -fPIC -DPIC -o .libs/libucxperf_la-ucp_tests.o

Second, the build also failed, and also in the same directory, but for a
totally different cause:

libtool: link: gcc -O3 -g -Wall -Werror -funwind-tables -Wno-missing-field-initializers -Wno-unused-parameter -Wno-unused-label -Wno-long-long -Wno-endif-labels -Wno-sign-compare -Wno-multichar -Wno-deprecated-declarations -Winvalid-pch -Wno-pointer-sign -Werror-implicit-function-declaration -Wno-format-zero-length -Wnested-externs -Wshadow -Werror=declaration-after-statement -fopenmp -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wl,-dynamic-list-data -Wl,-z -Wl,relro -o .libs/ucx_perftest ucx_perftest-perftest.o ucx_perftest-perftest_run.o ucx_perftest-perftest_params.o ucx_perftest-perftest_mad.o  -libmad -libumad lib/.libs/libucxperf.a /<<PKGBUILDDIR>>/src/ucp/.libs/libucp.so /<<PKGBUILDDIR>>/src/uct/.libs/libuct.so /<<PKGBUILDDIR>>/src/ucs/.libs/libucs.so -lm /<<PKGBUILDDIR>>/src/ucm/.libs/libucm.so -ldl -lrt -fopenmp
/usr/bin/ld: lib/.libs/libucxperf.a(libucxperf_la-uct_tests.o):(.data.rel.local.DW.ref.__gxx_personality_v0[DW.ref.__gxx_personality_v0]+0x0): undefined reference to `__gxx_personality_v0'

-- 
WBR, wRAR
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