If I use a cross compiler, how can I tell the value of the –host option I should give when I run ./configure? Three machines must be distinguished when discussing toolchain creation The build machine, where the toolchain is built. The host machine, where the toolchain will be executed. The target machine, where the binaries … Read more
The implicit make rule for compiling a C program is %.o:%.c $(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $< where the $() syntax expands the variables. As both CPPFLAGS and CFLAGS are used in the compiler call, which you use to define include paths is a matter of personal taste. For instance if foo.c is a … Read more
One significant problem with PKG_CHECK_MODULES is that it causes failures where it should not. If a user installs libfoo in /p/a/t/h and invokes a configure script with LDFLAGS=-L/p/a/t/h, the user is justified in expecting the configury to find libfoo. But, the user also must set PKG_CONFIG_PATH so that the configure script can find foo.pc in … Read more
As noted in this blog post and alluded to in the GCC Configure Terms, –target only applies when you are compiling toolchains. When you are doing normal cross-compilation of a library or binary you use –build=the architecture of the build machine –host=the architecture that you want the file to run on However, when you are … Read more