Just update calibre, and it looks like it builds a bunch of Python extensions. In the build output, I see many things like these:
g++ -O3 -Wall -DNDEBUG -fno-strict-aliasing -pipe -fPIC -march=amdfam10 -mcx16 -msahf -mpopcnt --param l1-cache-size=64 --param l1-cache-line-size=64 --param l2-cache-size=512 -mtune=amdfam10 -O2 -pipe -ggdb -pthread -I/usr/include/python2.7 -DPNG_SKIP_SETJMP_CHECK -DPOPPLER_OLD_LINK_TYPE -I/usr/include -I/usr/include/ImageMagick -I/usr/include/poppler -c /var/tmp/portage/app-text/calibre-0.8.23/work/calibre/src/calibre/ebooks/pdf/images.cpp -o /var/tmp/portage/app-text/calibre-0.8.23/work/calibre/build/objects/pdfreflow/images.o gcc -O3 -Wall -DNDEBUG -fno-strict-aliasing -pipe -fPIC -march=amdfam10 -mcx16 -msahf -mpopcnt --param l1-cache-size=64 --param l1-cache-line-size=64 --param l2-cache-size=512 -mtune=amdfam10 -O2 -pipe -ggdb -pthread -I/usr/include/python2.7 -I/usr/include/ImageMagick -c /var/tmp/portage/app-text/calibre-0.8.23/work/calibre/src/calibre/utils/magick/magick.c -o /var/tmp/portage/app-text/calibre-0.8.23/work/calibre/build/objects/magick/magick.o For reference, here are my CFLAGS: CFLAGS="-march=amdfam10 -mcx16 -msahf -mpopcnt --param l1-cache-size=64 --param l1-cache-line-size=64 --param l2-cache-size=512 -mtune=amdfam10 -O2 -pipe -ggdb" CXXFLAGS="${CFLAGS}" It looks like the package adds "-O3 -Wall -DNDEBUG -fno-strict-aliasing -pipe -fPIC" before appending CFLAGS or CXXFLAGS to the line, and it's calling 'gcc' or 'g++' directly, rather than x86_64-pc-linux-gnu-gcc, x86_64-pc-linux-gnu-g++ or something more generic. It was my understanding that the 'right' way to create a build system is to use the compiler for the target platform. I *think* that means the commands I noted, but I'm uncertain (And there's that it uses -O3, which is a bit spooky, and makes me worry more about the effects of compiler upgrades) Is this incorrect? Does it qualify as a bug? -- :wq