parallel make fails with mkdir: ./obj: File exists

[LudovicRousseau]

I have a multicore processor so I use make -j9 to benefit from GNU make parallelism.
But that fails with:

$ make -j2
/Applications/Xcode.app/Contents/Developer/usr/bin/make -C build/gmake
if [ ! -d ./obj ]; then mkdir ./obj; fi
if [ ! -d ./obj ]; then mkdir ./obj; fi
mkdir: ./obj: File exists
gcc -g -pedantic -Wall -I ../../include -Wunused-parameter  -D_DEBUG=1 -D_MSC_VER=1400 -o obj/access.o -c ../../src/access.c
make[1]: *** [obj/attrs.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [bin/tidy] Error 2

The problem is that the Makefile tries to create a obj directory before each compilation.

Using autoconf + automake would solve that problem and also #61, #79, #100, #116

[skull-squadron]

👍 Adding -j1 on my box works (which does parallel by default), but defeats the purpose of correctly specified dependencies. Furthermore, mkdir -p would be far simpler and succinct. Finally, putting an @ to silence noisy/ugly commands makes for easier comprehension of what's happening.

[ghost]

Can we please not use @ to hide the build commands? It makes it really difficult to understand what's going on when the build fails, which is the only time you're going to be paying attention anyway.

[geoffmcl]

The latest development branch, develop-500 now only uses cmake...
$ git pull and git checkout develop-500
Would really appreciate you building this branch, and reporting any problems...

[LudovicRousseau]

develop-500: The build works for me on Mac OS X 10.9.

[geoffmcl]

Thank you for your quick test and report... Can we close this issue?

[balthisar]

Close, now using cmake in develop-500.