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Use generic __ifunc for SPARC.
glibc fails to build with GCC mainline for SPARC because of the use of manually-created IFUNCs, which fail the tests of compatibility of function alias types. This patch changes sparc-ifunc.h to use the generic __ifunc in defining sparc_libm_ifunc. The generic __ifunc can use the GCC ifunc attribute when available, so ensuring type-correctness as well as better debug info than when setting symbol types in asm statements. Note that for this to fix the build with GCC mainline the GCC patch <https://gcc.gnu.org/ml/gcc-patches/2017-09/msg01779.html>, or building GCC with --enable-gnu-indirect-function, is also needed. Tested (compilation only) with build-many-glibcs.py (sparc64-linux-gnu and sparcv9-linux-gnu, with GCC 8 with the above patch, and also with GCC 7). * sysdeps/sparc/sparc-ifunc.h [!__ASSEMBLER__] (sparc_libm_ifunc): Define using __ifunc.
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@ -1,3 +1,8 @@
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2017-09-26 Joseph Myers <joseph@codesourcery.com>
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* sysdeps/sparc/sparc-ifunc.h [!__ASSEMBLER__] (sparc_libm_ifunc):
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Define using __ifunc.
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2017-09-26 Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
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* sysdeps/powerpc/fpu/libm-test-ulps: Regenerate expf() and
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@ -163,13 +163,7 @@ END (__##name)
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#else /* __ASSEMBLER__ */
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# define sparc_libm_ifunc(name, expr) \
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extern void *name##_ifunc (int) __asm__ (#name); \
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void *name##_ifunc (int hwcap) \
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{ \
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__typeof (name) *res = expr; \
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return res; \
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} \
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__asm__ (".type " #name ", %gnu_indirect_function");
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__ifunc (name, name, expr, int hwcap, libm_ifunc_init)
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# define sparc_libc_ifunc(name, expr) sparc_libm_ifunc (name, expr)
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