gcc fails to inline a simple function if it is first declared non-inline. There is no warning with -Winline.
$ gcc -S -O2 -Winline -fpic inline.c $ grep fxstatat64 inline.s $ gcc -S -O2 -Winline -fpic inline.c -DNO_DECL $ grep fxstatat64 inline.s bl __gi___fxstata...@local -- Summary: [4.5 regression] gcc fails to inline simple function Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: schwab at linux-m68k dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41284