Support for gcc -wrapper option

[comio]

Dear All,

I'm trying to use ccache in my environment. I love this tool but I noticed that when I use the gcc --wrapper option the ccache recognizes it as "multiple source files" (with fallback to the compiler).

My command line is like:

ccache aarch64-linux-gnu-g++ -wrapper my-custom-wrapper.bin -no-integrated-cpp -g -ggdb -Wall -Wconversion -Wno-unused-variable -Wno-unused-parameter -Wfatal-errors -Werror -ffunction-sections -fdata-sections -O0 -Wno-implicit-fallthrough -std=c++17 -fPIC -MMD -Wno-shadow -g -fPIC -Wno-unused-but-set-variable -MD -MT file.cc.o -MF file.cc.o.d -o file.cc.o -c file.cc

Thanks a lot and have a nice day.

luigi

[jrosdahl]

Not sure if it's possible to support -wrapper in a reasonable way, but here are some notes for a potential implementation:

• Need to handle -wrapper @file specially where the @file part does not get expanded like normal @file arguments do.
• Need to split the argument to -wrapper on , to find the wrapper executable.
• Probably should run hash_compiler on the wrapper executable. This should be enough for things like running strace or gdb, but is it enough for wrappers that modify the outcome?

Meanwhile I'll mark -wrapper as "too hard" so that the result will be "unsupported compiler option" instead of "multiple source files".