The following program causes a linker failure on mainline when compiled with "gcc -fopenmp -O -std=c99":
==================================== inline void foo() {} int main() { foo(); #pragma omp parallel for for ( int i=0; i<1; ++i ) foo(); return 0; } ==================================== /tmp/ccoKlB2q.o(.text+0x47): In function `main.omp_fn.0': : undefined reference to `foo' collect2: ld returned 1 exit status The 4.2 branch is not affected. -- Summary: [4.3 regression] Linker failure with OpenMP and inline function Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: link-failure, openmp Severity: normal Priority: P3 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: reichelt at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30696