configure xorg-server-1.4.2 with -O -flto in $CFLAGS make Eventually it fails with:
gcc -DHAVE_DIX_CONFIG_H -Wall -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -fno-strict-aliasing -D_BSD_SOURCE -DHAS_FCHOWN -DHAS_STICKY_DIR_BIT -DDBUS_API_SUBJECT_TO_CHANGE -I/usr/local/include -I/usr/local/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/hal -I/usr/include/dbus-1.0 -I/usr/lib/dbus-1.0/include -I../../../../include -I../../../../include -I../../../../Xext -I../../../../composite -I../../../../damageext -I../../../../xfixes -I../../../../Xi -I../../../../mi -I../../../../miext/shadow -I../../../../miext/damage -I../../../../render -I../../../../randr -I../../../../fb -DHAVE_XORG_CONFIG_H -DXF86PM -I/usr/local/include -O -flto -I/usr/include/drm -I/usr/include/X11/dri -o cvt cvt-cvt.o cvt-xf86cvt.o ../../../../hw/xfree86/dummylib/libdummy-nonserver.a -lm -lrt In function 'xf86CVTMode': lto1: error: invalid conversion in return statement struct _DisplayModeRec * struct DisplayModeRec * return Mode_13; lto1: internal compiler error: verify_stmts failed Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. lto-wrapper: /usr/local/bin/gcc returned 1 exit status collect2: lto-wrapper returned 1 exit status make: *** [cvt] Error 1 -- Summary: lto1: internal compiler error: verify_stmts failed Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: lto AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: b3timmons at speedymail dot org GCC build triplet: x86_64-unknown-linux-gnu GCC host triplet: x86_64-unknown-linux-gnu GCC target triplet: x86_64-unknown-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41832
