On Tue, 2021-03-23 at 20:16 -0500, Bob Friesenhahn wrote: > On Tue, 23 Mar 2021, Dan Mahoney (Gushi) wrote: > > > Is there a "standard" way to do this? Google kind of fails for this. > > I see that Gavin Smith already answered the question you asked, but > GraphicsMagick took a different tact. The configure options used are > interesting but don't provide the answers for what the configure > script ended up using for the build. And so GraphicsMagick is > providing additional data like this: > > Configured using the command: > ../GraphicsMagick/configure 'PSDelegate=/bin/true' 'CC=gcc-10' > 'CXX=g++-10' 'CFLAGS=-march=native -O2 -frename-registers -g -Wall > -Winline -W -Wformat-security -Wpointer-arith -Wdisabled-optimization > -Wmissing-noreturn -Wno-unknown-pragmas -Wvla' 'CXXFLAGS=-march=native > -O2 -g -Wall -Winline -W -Wextra -Wno-unknown-pragmas' > 'LDFLAGS=-L/usr/local/lib -Wl,-rpath,/usr/local/lib' > '--with-quantum-depth=16' '--disable-shared' '--enable-static' > '--enable-openmp-slow' '--enable-silent-rules' '--without-xml' > > Final Build Parameters: > CC = gcc-10 > CFLAGS = -fopenmp -march=native -O2 -frename-registers -g -Wall > -Winline -W -Wformat-security -Wpointer-arith -Wdisabled-optimization > -Wmissing-noreturn -Wno-unknown-pragmas -Wvla -Wall -pthread > CPPFLAGS = -I/usr/include/freetype2 > CXX = g++-10 > CXXFLAGS = -march=native -O2 -g -Wall -Winline -W -Wextra > -Wno-unknown-pragmas -pthread > LDFLAGS = -L/usr/local/lib -Wl,-rpath,/usr/local/lib > LIBS = -ljbig -lwebp -lwebpmux -llcms2 -ltiff -lfreetype -ljpeg > -lpng16 -lwmflite -lX11 -llzma -lz -lzstd -lm -lpthread For reference, there is a downside to doing this which is that you can end up with non-reproducible binaries. Yocto Project cross compiles and uses compiler commands like: x86_64-poky-linux-gcc \ --sysroot=/media/build1/poky/build/tmp/work/core2-64-poky-linux/acl/2.2.53-r0/recipe-sysroot \ -O2 -pipe -g -feliminate-unused-debug-types -fmacro-prefix-map=/media/build1/poky/build/tmp/work/core2-64-poky-linux/acl/2.2.53-r0=/usr/src/debug/acl/2.2.53-r0 -fdebug-prefix-map=/media/build1/poky/build/tmp/work/core2-64-poky-linux/acl/2.2.53-r0=/usr/src/debug/acl/2.2.53-r0 -fdebug-prefix-map=/media/build1/poky/build/tmp/work/core2-64-poky-linux/acl/2.2.53-r0/recipe-sysroot= -fdebug-prefix-map=/media/build1/poky/build/tmp/work/core2-64-poky-linux/acl/2.2.53-r0/recipe-sysroot-native= -fvisibility=hidden -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -Wl,-z -Wl,relro -Wl,-z -Wl,now which ensure that we end up with cross compiled binaries that are reproducible regardless of the path they're built in and that debug objects and debug code can be correctly found. The downside is that build paths are in CC/CFLAGS and if those are injected into any of the output without filtering, the result depends on the build path. The same does apply to hardcoding the configure command to a lesser extent as there may or may not be build paths present, it depends on the configure script in question and what inputs it needs. In the cases where a project has added things like this, we tend to have to patch it out. Cheers, Richard
