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PI_STATIC_AND_HIDDEN indicates whether accesses to internal linkage variables and hidden visibility variables in a shared object (ld.so) need dynamic relocations (usually R_*_RELATIVE). PI (position independent) in the macro name is a misnomer: a code sequence using GOT is typically position-independent as well, but using dynamic relocations does not meet the requirement. Not defining PI_STATIC_AND_HIDDEN is legacy and we expect that all new ports will define PI_STATIC_AND_HIDDEN. Current ports defining PI_STATIC_AND_HIDDEN are more than the opposite. Change the configure default. No functional change. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
29 lines
891 B
Plaintext
29 lines
891 B
Plaintext
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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dnl The standard hppa assembler uses `;' to start comments and `!'
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dnl as a line separator.
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AC_CACHE_CHECK(for assembler line separator,
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libc_cv_asm_line_sep, [dnl
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cat > conftest.s <<EOF
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nop ; is_old_puffin
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EOF
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if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
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libc_cv_asm_line_sep='!'
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else
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if test -z "$enable_hacker_mode"; then
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echo "*** You need a newer assembler to compile glibc"
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rm -f conftest*
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exit 1
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fi
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libc_cv_asm_line_sep=';'
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fi
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rm -f conftest*])
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AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
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AC_DEFINE(HIDDEN_VAR_NEEDS_DYNAMIC_RELOC)
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# PIE builds fail on binutils 2.37 and earlier, see:
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# https://sourceware.org/bugzilla/show_bug.cgi?id=28672
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AC_DEFINE(PIE_UNSUPPORTED)
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# work around problem with autoconf and empty lines at the end of files
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