Re: [ccache] BUG: ccache + icecream + clang -Weverything results in false "warning: macro is not used [-Wunused-macros]"
It looks like it is a clang bug! See icecream answer here: https://github.com/icecc/icecream/issues/514 Eric Le 20-01-22 à 09:20, Eric Chamberland via ccache a écrit : Hi, We have a simple but annoying bug with ccache (3.7.1) + icecream + clang 7.0. This file: = #define UsedMacro double double foo(); double foo() { UsedMacro var = 0; return var; } = Compiles without warnings if compiled with bare clang 7.0 like this: /usr/bin/clang -Weverything -c t.cc It compiles also without warnings if I use cache: ccache -C && /usr/lib64/ccache/clang -Weverything -c t.cc But If I add export CCACHE_PREFIX=/opt/icecream-1.2/bin/icecc, resulting in this environnement: CCACHE_PREFIX=/opt/icecream-1.2/bin/icecc CCACHE_SLOPPINESS=include_file_mtime CCACHE_HARDLINK=1 CCACHE_DIR=/d1/home/ericc/eric-ccache/ then I have a "false" warning: ccache -C && /usr/lib64/ccache/clang -Weverything -c t.cc Cleared cache t.cc:1:9: warning: macro is not used [-Wunused-macros] #define UsedMacro double ^ 1 warning generated. Is it a ccache bug or an icecream bug? Thanks, Eric -- Eric Chamberland, ing., M. Ing Professionnel de recherche GIREF/Université Laval (418) 656-2131 poste 41 22 42 ___ ccache mailing list ccache@lists.samba.org https://lists.samba.org/mailman/listinfo/ccache
[ccache] BUG: ccache + icecream + clang -Weverything results in false "warning: macro is not used [-Wunused-macros]"
Hi, We have a simple but annoying bug with ccache (3.7.1) + icecream + clang 7.0. This file: = #define UsedMacro double double foo(); double foo() { UsedMacro var = 0; return var; } = Compiles without warnings if compiled with bare clang 7.0 like this: /usr/bin/clang -Weverything -c t.cc It compiles also without warnings if I use cache: ccache -C && /usr/lib64/ccache/clang -Weverything -c t.cc But If I add export CCACHE_PREFIX=/opt/icecream-1.2/bin/icecc, resulting in this environnement: CCACHE_PREFIX=/opt/icecream-1.2/bin/icecc CCACHE_SLOPPINESS=include_file_mtime CCACHE_HARDLINK=1 CCACHE_DIR=/d1/home/ericc/eric-ccache/ then I have a "false" warning: ccache -C && /usr/lib64/ccache/clang -Weverything -c t.cc Cleared cache t.cc:1:9: warning: macro is not used [-Wunused-macros] #define UsedMacro double ^ 1 warning generated. Is it a ccache bug or an icecream bug? Thanks, Eric -- Eric Chamberland, ing., M. Ing Professionnel de recherche GIREF/Université Laval (418) 656-2131 poste 41 22 42 ___ ccache mailing list ccache@lists.samba.org https://lists.samba.org/mailman/listinfo/ccache