malc schrieb: > On Thu, 19 Nov 2009, Stefan Weil wrote: > >> Make using mingw32 on windows does not preserve $@ in macros >> when they are modified using this pattern: >> target: macro += something >> >> This behaviour results in an error when QEMU_CFLAGS containing >> "-MMD -MP -MT $@" is modified for compilation of source files >> which use SDL: $@ will expand to nothing, -MT no longer has >> the correct argument (it will take the next one from the command >> line) and the build will fail or run with a wrong command line. >> >> The problem is fixed by using a new macro QEMU_DGFLAGS >> which is not modified by a target rule. > > Why not just stuff `-MMD -MP -MT $@' into the rules? > > [..snip..]
As in most cases, there are many ways to do something... During my test, I had the dependency flags in the rules. I decided to use a macro to allow people running make without dependency generation (make QEMU_DGFLAGS=). Stefan
