libprom: add -fcommon workaround
Workaround build failure on -fno-common toolchains like upstream gcc-10. Otherwise build fails as: ld: CMakeFiles/prom.dir/src/prom_process_stat.c.o:(.bss+0x0): multiple definition of `prom_process_start_time_seconds'; CMakeFiles/prom.dir/src/prom_collector.c.o:(.bss+0x0): first defined here
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@ -43,6 +43,13 @@ let
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# Workaround build failure on -fno-common toolchains like upstream
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# gcc-10. Otherwise build fails as:
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# ld: CMakeFiles/prom.dir/src/prom_process_stat.c.o:(.bss+0x0): multiple definition of
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# `prom_process_start_time_seconds'; CMakeFiles/prom.dir/src/prom_collector.c.o:(.bss+0x0): first defined here
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# Should be fixed in 1.2.0 and later: https://github.com/digitalocean/prometheus-client-c/pull/25
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NIX_CFLAGS_COMPILE = "-fcommon";
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preConfigure = ''
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preConfigure = ''
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cd ${subdir}
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cd ${subdir}
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'';
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'';
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