After looking closer, I must amend my first statement. It seems not to be the subdirs, but the first gcc commands after 'make clean && make':
Here I have only 1 core utilization: gcc -DHAVE_CONFIG_H -DNO_XMALLOC -I. -I.. -I. -I. -I.. -I.. -DIN_LIBUNISTRING -DDEPENDS_ON_LIBICONV=1 -g -c amemxfrm.c gcc -DHAVE_CONFIG_H -DNO_XMALLOC -I. -I.. -I. -I. -I.. -I.. -DIN_LIBUNISTRING -DDEPENDS_ON_LIBICONV=1 -g -c c-ctype.c gcc -DHAVE_CONFIG_H -DNO_XMALLOC -I. -I.. -I. -I. -I.. -I.. -DIN_LIBUNISTRING -DDEPENDS_ON_LIBICONV=1 -g -c c-strcasecmp.c ... gcc -DHAVE_CONFIG_H -DNO_XMALLOC -I. -I.. -I. -I. -I.. -I.. -DIN_LIBUNISTRING -DDEPENDS_ON_LIBICONV=1 -g -c version.c gcc -DHAVE_CONFIG_H -DNO_XMALLOC -I. -I.. -I. -I. -I.. -I.. -DIN_LIBUNISTRING -DDEPENDS_ON_LIBICONV=1 -g -c fseterr.c gcc -DHAVE_CONFIG_H -DNO_XMALLOC -I. -I.. -I. -I. -I.. -I.. -DIN_LIBUNISTRING -DDEPENDS_ON_LIBICONV=1 -g -c mbrtowc.c It seems to be a simple for loop (for f in amemxfrm.c c-ctype.h ...). After this we have a parallel build: /usr/bin/make all-am make[3]: Entering directory '/home/oms/src/libunistring/lib' /bin/bash ../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -DNO_XMALLOC -I. -I.. -I. -I. -I.. -I.. -DIN_LIBUNISTRING -DDEPENDS_ON_LIBICONV=1 -g -c -o amemxfrm.lo amemxfrm.c ... I am not an expert here, but using a shell with job control couldn't the the loop be parallelized (e.g. when using bash -> parallel run ) ? Regards, Tim
