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7c7bcf3634
Teach the linker that __mcount_internal, __sigjmp_save_symbol, __syscall_error and __GI_exit do not use r2, so that it does not need to recover r2 after the call. Test at configure time if the assembler supports @notoc and define USE_PPC64_NOTOC.
62 lines
1.9 KiB
Plaintext
62 lines
1.9 KiB
Plaintext
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
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# Local configure fragment for sysdeps/powerpc/powerpc64.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for support for overlapping .opd entries" >&5
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$as_echo_n "checking for support for overlapping .opd entries... " >&6; }
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if ${libc_cv_overlapping_opd+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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libc_cv_overlapping_opd=no
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echo 'void foo (void) {}' > conftest.c
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if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -S conftest.c -o conftest.s 1>&5'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }; then
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if grep '\.TOC\.@tocbase' conftest.s > /dev/null; then
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if grep '\.TOC\.@tocbase[ ]*,[ ]*0' conftest.s > /dev/null; then
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:
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else
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libc_cv_overlapping_opd=yes
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fi
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fi
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fi
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rm -f conftest.c conftest.s
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_overlapping_opd" >&5
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$as_echo "$libc_cv_overlapping_opd" >&6; }
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if test x$libc_cv_overlapping_opd = xyes; then
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$as_echo "#define USE_PPC64_OVERLAPPING_OPD 1" >>confdefs.h
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fi
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# @notoc started to be supported in GNU Binutils 2.31.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if the assembler supports @notoc" >&5
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$as_echo_n "checking if the assembler supports @notoc... " >&6; }
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if ${libc_cv_ppc64_notoc+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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void foo (void) {asm("b foo@notoc");}
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_ACEOF
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if ac_fn_c_try_compile "$LINENO"; then :
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libc_cv_ppc64_notoc=yes
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else
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libc_cv_ppc64_notoc=no
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ppc64_notoc" >&5
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$as_echo "$libc_cv_ppc64_notoc" >&6; }
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if test x$libc_cv_ppc64_notoc = xyes; then :
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$as_echo "#define USE_PPC64_NOTOC 1" >>confdefs.h
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fi
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