Loading Changes.md +15 −0 Original line number Diff line number Diff line # Build System Changes for Android.mk Writers ## `m4` is not available on `$PATH` There is a prebuilt of it available in prebuilts/build-tools, and a make variable `M4` that contains the path. Beyond the direct usage, whenever you use bison or flex directly, they call m4 behind the scene, so you must set the M4 environment variable (and depend upon it for incremental build correctness): ``` $(intermediates)/foo.c: .KATI_IMPLICIT_OUTPUTS := $(intermediates)/foo.h $(intermediates)/foo.c: $(LOCAL_PATH)/foo.y $(M4) $(BISON) $(BISON_DATA) M4=$(M4) $(BISON) ... ``` ## Rules executed within limited environment With `ALLOW_NINJA_ENV=false` (soon to be the default), ninja, and all the Loading Loading
Changes.md +15 −0 Original line number Diff line number Diff line # Build System Changes for Android.mk Writers ## `m4` is not available on `$PATH` There is a prebuilt of it available in prebuilts/build-tools, and a make variable `M4` that contains the path. Beyond the direct usage, whenever you use bison or flex directly, they call m4 behind the scene, so you must set the M4 environment variable (and depend upon it for incremental build correctness): ``` $(intermediates)/foo.c: .KATI_IMPLICIT_OUTPUTS := $(intermediates)/foo.h $(intermediates)/foo.c: $(LOCAL_PATH)/foo.y $(M4) $(BISON) $(BISON_DATA) M4=$(M4) $(BISON) ... ``` ## Rules executed within limited environment With `ALLOW_NINJA_ENV=false` (soon to be the default), ninja, and all the Loading
