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Fix mips16 __fpu_control static linking (bug 18397).

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Programs are supposed to be able to define the __fpu_control variable,
overriding the library's version to cause the floating-point control
word to be set to the chosen value at startup.

This is broken for mips16 for static linking because the library's
__fpu_control variable is in the same object file as the helper
functions used by fpu_control.h for mips16, so test-fpucw-ieee-static
fails to link with multiple definitions of __fpu_control.

This patch fixes this by putting the helpers in a separate file rather
than overriding fpu_control.c.  Tested for mips16 that this fixes the
link failure and the ABI tests still pass.

	[BZ #18397]
	* sysdeps/mips/mips32/fpu/fpu_control.c: Move to ....
	* sysdeps/mips/mips32/fpu/fpucw-helpers.c: ... here.  Include
	<fpu_control.h> instead of <math/fpu_control.c>.
	* sysdeps/mips/mips32/fpu/Makefile: New file.
This commit is contained in:
Joseph Myers 2015-05-11 22:58:10 +00:00
parent b13b96ca05
commit 34cb304e5a
4 changed files with 13 additions and 2 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2015-05-11 Joseph Myers <joseph@codesourcery.com>
[BZ #18397]
* sysdeps/mips/mips32/fpu/fpu_control.c: Move to ....
* sysdeps/mips/mips32/fpu/fpucw-helpers.c: ... here. Include
<fpu_control.h> instead of <math/fpu_control.c>.
* sysdeps/mips/mips32/fpu/Makefile: New file.
2015-05-11 Andreas Schwab <schwab@suse.de>
[BZ #18007]

2
NEWS
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@ -17,7 +17,7 @@ Version 2.22
18007, 18019, 18020, 18029, 18030, 18032, 18036, 18038, 18039, 18042,
18043, 18046, 18047, 18068, 18080, 18093, 18100, 18104, 18110, 18111,
18125, 18128, 18138, 18185, 18197, 18206, 18210, 18211, 18247, 18287,
18319, 18333, 18346.
18319, 18333, 18346, 18397.
* Cache information can be queried via sysconf() function on s390 e.g. with
_SC_LEVEL1_ICACHE_SIZE as argument.

3
sysdeps/mips/mips32/fpu/Makefile Normal file
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@ -0,0 +1,3 @@
ifeq ($(subdir),math)
aux += fpucw-helpers
endif

2
sysdeps/mips/mips32/fpu/fpu_control.c → sysdeps/mips/mips32/fpu/fpucw-helpers.c
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@ -16,7 +16,7 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <math/fpu_control.c>
#include <fpu_control.h>
fpu_control_t
__mips_fpu_getcw (void)