Properly set flag_pie and flag_pic

We can't set flag_pie to the default when flag_pic == 0, which may be
set by -fno-pic or -fno-PIC, since the default value of flag_pie is
non-zero when GCC is configured with --enable-default-pie.  We need
to initialize flag_pic to -1 so that we can tell if -fpic, -fPIC,
-fno-pic or -fno-PIC is used.

Since Darwin defaults to PIC (__PIC__ == 2) and the PIC setting can't
be changed, skip tests of default __PIC__ and __PIE__ setting for
*-*-darwin* targets.

gcc/

	PR driver/70192
	* opts.c (finish_options): Don't set flag_pie to the default if
	-fpic, -fPIC, -fno-pic or -fno-PIC is used.  Set flag_pic to 0
	if it is -1.

gcc/testsuite/

	PR driver/70192
	* gcc.dg/pic-1.c: New test.
	* gcc.dg/pic-2.c: Likewise.
	* gcc.dg/pic-3.c: Likewise.
	* gcc.dg/pic-4.c: Likewise.
	* gcc.dg/pie-1.c: Likewise.
	* gcc.dg/pie-2.c: Likewise.
	* gcc.dg/pie-3.c: Likewise.
	* gcc.dg/pie-4.c: Likewise.
	* gcc.dg/pie-5.c: Likewise.
	* gcc.dg/pie-6.c: Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@234295 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 2 insertions, 2 deletions

diff --git a/gcc/common.opt b/gcc/common.opt
index 1c8cc8ede8f..67048db7c9b 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -1840,7 +1840,7 @@ Common Report Var(flag_peephole2) Optimization
 Enable an RTL peephole pass before sched2.
 
 fPIC
-Common Report Var(flag_pic,2) Negative(fPIE)
+Common Report Var(flag_pic,2) Negative(fPIE) Init(-1)
 Generate position-independent code if possible (large mode).
 
 fPIE
@@ -1848,7 +1848,7 @@ Common Report Var(flag_pie,2) Negative(fpic) Init(-1)
 Generate position-independent code for executables if possible (large mode).
 
 fpic
-Common Report Var(flag_pic,1) Negative(fpie)
+Common Report Var(flag_pic,1) Negative(fpie) Init(-1)
 Generate position-independent code if possible (small mode).
 
 fpie