I have a makefile that works just fine in make 3.81 on RHEL 6.8, but quickly fails with make 4.1 on Ubuntu 16.04.
It's failing on this line (details changed, but same logic): $(if $(myvar),myothervar := abc,myothervar := xyz) with error message: build.mk:3: *** empty variable name. Stop. With some added debug, I can verify that $(myvar) is empty at this point in the make file. I searched Google, perused StackOverflow, searched GNU make bugs, and the GNU make docs -- no luck. I can't even find in the docs where the "$(if ...)" syntax is described. Has this behavior changed in make 4.1? Or maybe $(if ...) has been deprecated for a long time, and make 4.1 finally axed it... ? If it did change, when? And, finally, if you made it this far, what's the recommended alternative -- ifdef? Thx in advance for any help! Best, --David Drinnan _______________________________________________ Help-make mailing list Help-make@gnu.org https://lists.gnu.org/mailman/listinfo/help-make
