id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
3621	Check for OpenMP in configure script is broken	tian	Martin Sjölund	"The macro AC_TRY_LINK for openMP in configure.in:379 is not working as intended. GCC fails silently while Clang blocks.

The reason is that the second argument to AC_TRY_LINK must not contain the whole main() function 
[int main(){do();something();}] but rather its body [do();something();]. 

https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.69/html_node/Obsolete-Macros.html#index-AC_005fTRY_005fLINK-2208
"	defect	closed	high	1.9.4	Build Environment		fixed	autoconf, build, OpenMP, Linux