Allow shared and static make targets.
Trigger library rebuild if headers changed.
Merge branch 'build_system' of https://github.com/jpflori/flint2 into trunk
Add longlong.h header to HEADERS.
Move Makefile.mod to Makefile.subdirs because of implicit .mod rule.
Add verbose make target.
Replace Makefile.mod by Makefile.subdirs within Makefile.in.
Merge branch 'build_system' of https://github.com/jpflori/flint2 into trunk
Fix for make check in subdirs.
Make static/shared/check for extension modules.
Fix for make profile in subdirs.
Merge branch 'build_system' of https://github.com/jpflori/flint2 into trunk
Merge branch 'build_system' of https://github.com/jpflori/flint2 into trunk
Add EXEEXT variable for executable extension.
Merge branch 'trunk' into build_system
Fix -lpthread typo.
Fix EXEEXT typo.
Define tests make target to build tests file without running them.
Support building of extension modules.
Merge branch 'build_system' of https://github.com/jpflori/flint2 into trunk

Conflicts:
	Makefile.subdirs