Hello,
currently, there is no support for spu-elf in crossconfig.m4. In the past,
we've usually worked around this by configuring GCC with --with-newlib.
But that has other drawbacks since it performs no link tests at all, and
thus assumes only a very minimal set of features available via newlib.
This has become a problem since libgfortran switched to respecting
--with-newlib; now many tests fail due to supposedly unavailable
library features, which newlib actually would support -- on SPU.
So we want to move away from using --with-newlib and do the normal
link-time tests, even though the library still is newlib. (The link
checks will work fine if you actually have an SPU library installed.)
That now breaks libstdc++ builds due to missing crossconfig.m4 support.
The patch below adds such support, by performing the usual link checks.
The only missing features (as compared to the -linux crossconfig.m4
entry) are TLS (SPU is single-threaded), and random (SPU code should
not access /dev files on the host).
Tested on spu-elf.
OK for mainline?
Bye,
Ulrich
ChangeLog:
* crossconfig.m4: Support spu-*-elf* targets.
* configure: Regenerate.
Index: libstdc++-v3/crossconfig.m4
===================================================================
*** libstdc++-v3/crossconfig.m4 (revision 208613)
--- libstdc++-v3/crossconfig.m4 (working copy)
*************** case "${host}" in
*** 28,33 ****
--- 28,41 ----
AC_DEFINE(HAVE_SQRTF)
;;
+ spu-*-elf*)
+ GLIBCXX_CHECK_COMPILER_FEATURES
+ GLIBCXX_CHECK_LINKER_FEATURES
+ GLIBCXX_CHECK_MATH_SUPPORT
+ GLIBCXX_CHECK_STDLIB_SUPPORT
+ AM_ICONV
+ ;;
+
*-aix*)
GLIBCXX_CHECK_LINKER_FEATURES
GLIBCXX_CHECK_MATH_SUPPORT
