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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>
43 lines
1.3 KiB
Plaintext
43 lines
1.3 KiB
Plaintext
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for assembler line separator" >&5
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$as_echo_n "checking for assembler line separator... " >&6; }
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if ${libc_cv_asm_line_sep+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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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='${CC-cc} -c $ASFLAGS conftest.s 1>&5'
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{ { eval echo "\"\$as_me\":${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 $ac_status = 0; }; }; then
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libc_cv_asm_line_sep='!'
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else
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if test -z "$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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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_asm_line_sep" >&5
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$as_echo "$libc_cv_asm_line_sep" >&6; }
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cat >>confdefs.h <<_ACEOF
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#define ASM_LINE_SEP $libc_cv_asm_line_sep
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_ACEOF
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$as_echo "#define HIDDEN_VAR_NEEDS_DYNAMIC_RELOC 1" >>confdefs.h
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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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$as_echo "#define PIE_UNSUPPORTED 1" >>confdefs.h
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# work around problem with autoconf and empty lines at the end of files
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