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Compilation failed on ubuntu 18.04 with gcc 7.5.0

on both wireplumber 0.4.0 and master compilation failed on ubutnu 18.04 having gcc 7.5.0, All other dependencies version can be looked under log files

Found ninja-1.10.2 at /usr/bin/ninja
[3/143] Compiling C object lib/wp/libwireplumber-0.4.so.0.4.0.p/meson-generated_.._wpenums.c.o
FAILED: lib/wp/libwireplumber-0.4.so.0.4.0.p/meson-generated_.._wpenums.c.o
cc -Ilib/wp/libwireplumber-0.4.so.0.4.0.p -Ilib/wp -I../lib/wp -Ilib -I../lib -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/libmou
nt -I/usr/include/blkid -I/usr/include/uuid -I/usr/include/pipewire-0.3 -I/usr/include/spa-0.2 -fdiagnostics-color=always -pipe -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-p
ch -O2 -g -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_62 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_62 -fvisibility=hidden -Wsuggest-attribute=format -Wsign-compare -Wpoi
nter-arith -Wpointer-sign -Wformat -Wformat-security -Wimplicit-fallthrough -Wmissing-braces -Wtype-limits -Wvariadic-macros -Wno-missing-field-initializers -Wno-unused
-parameter -Wno-pedantic -Wold-style-declaration -Wunused-result -fPIC -D_REENTRANT -pthread -D_GNU_SOURCE -DG_LOG_USE_STRUCTURED '-DWIREPLUMBER_DEFAULT_MODULE_DIR="/us
r/local/lib/x86_64-linux-gnu/wireplumber-0.4"' '-DWIREPLUMBER_DEFAULT_CONFIG_DIR="/usr/local/etc/wireplumber"' '-DWIREPLUMBER_DEFAULT_DATA_DIR="/usr/local/share/wireplu
mber"' -DBUILDING_WP -MD -MQ lib/wp/libwireplumber-0.4.so.0.4.0.p/meson-generated_.._wpenums.c.o -MF lib/wp/libwireplumber-0.4.so.0.4.0.p/meson-generated_.._wpenums.c.o
.d -o lib/wp/libwireplumber-0.4.so.0.4.0.p/meson-generated_.._wpenums.c.o -c lib/wp/wpenums.c
In file included from ../lib/wp/global-proxy.h:12:0,
                 from ../lib/wp/client.h:12,
                 from lib/wp/wpenums.c:5:
../lib/wp/proxy.h:51:5: error: initializer element is not constant
     (WP_PIPEWIRE_OBJECT_FEATURES_MINIMAL |
     ^
[4/143] Generating doxyxml_wp with a custom command
warning: ignoring unsupported tag 'CLANG_ADD_INC_PATHS' at line 1102, file docs/Doxyfile-wp
ninja: build stopped: subcommand failed.

Here are the logs - wireplumber_ubuntu1804.log meson-log.txt

always Reproducible

Steps to Reproduce:

  1. clone the repo
  2. cd into the dir
  3. just do meson setup build and meson compile -C build
  4. You can see the compilation error

Expected Results:

The compilation should be successfull on all version.

Now I'll be bisecting with git to find out which commit did the problem.

EDIT -

git bisect did not helped. The problem persist from the long time.

Edited by Sourav Das