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Correctly determine libc.so 'OUTPUT_FORMAT' when cross-compiling.
Commit 87d583c6e8
replaces the sed script
with an "objdump -f" invocation to determine the 'OUTPUT_FORMAT' bit of
the libc.so linker script.
However, when cross-compiling, for example from x86_64-linux-gnu to
aarch64-linux-gnu, "objdump -f" would report the wrong
format ("elf64-little"). Conversely, "aarch64-linux-gnu-objdump -f"
reports "elf64-littleaarch64" as expected.
This patch changes 'configure.ac' to use AC_CHECK_TOOL rather than
'$CC -print-prog-name=objdump' to determine the value of the OBJDUMP
variable. That way, OBJDUMP is set to TRIPLET-objdump when
cross-compiling for TRIPLET.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
parent
8c77e26ba8
commit
361d6454c0
2
aclocal.m4
vendored
2
aclocal.m4
vendored
@ -122,8 +122,6 @@ AS=`$CC -print-prog-name=as`
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LD=`$CC -print-prog-name=$LDNAME`
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AR=`$CC -print-prog-name=ar`
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AC_SUBST(AR)
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OBJDUMP=`$CC -print-prog-name=objdump`
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AC_SUBST(OBJDUMP)
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OBJCOPY=`$CC -print-prog-name=objcopy`
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AC_SUBST(OBJCOPY)
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GPROF=`$CC -print-prog-name=gprof`
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96
configure
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96
configure
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@ -649,7 +649,6 @@ LD
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AS
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GPROF
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OBJCOPY
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OBJDUMP
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AR
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LN_S
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INSTALL_DATA
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@ -685,6 +684,7 @@ sysheaders
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ac_ct_CXX
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CXXFLAGS
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CXX
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OBJDUMP
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READELF
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CPP
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cross_compiling
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@ -2963,6 +2963,98 @@ else
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READELF="$ac_cv_prog_READELF"
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fi
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if test -n "$ac_tool_prefix"; then
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# Extract the first word of "${ac_tool_prefix}objdump", so it can be a program name with args.
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set dummy ${ac_tool_prefix}objdump; ac_word=$2
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
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$as_echo_n "checking for $ac_word... " >&6; }
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if ${ac_cv_prog_OBJDUMP+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if test -n "$OBJDUMP"; then
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ac_cv_prog_OBJDUMP="$OBJDUMP" # Let the user override the test.
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else
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH
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do
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IFS=$as_save_IFS
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test -z "$as_dir" && as_dir=.
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for ac_exec_ext in '' $ac_executable_extensions; do
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if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
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ac_cv_prog_OBJDUMP="${ac_tool_prefix}objdump"
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$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
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break 2
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fi
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done
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done
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IFS=$as_save_IFS
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fi
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fi
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OBJDUMP=$ac_cv_prog_OBJDUMP
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if test -n "$OBJDUMP"; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5
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$as_echo "$OBJDUMP" >&6; }
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else
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
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$as_echo "no" >&6; }
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fi
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fi
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if test -z "$ac_cv_prog_OBJDUMP"; then
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ac_ct_OBJDUMP=$OBJDUMP
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# Extract the first word of "objdump", so it can be a program name with args.
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set dummy objdump; ac_word=$2
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
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$as_echo_n "checking for $ac_word... " >&6; }
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if ${ac_cv_prog_ac_ct_OBJDUMP+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if test -n "$ac_ct_OBJDUMP"; then
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ac_cv_prog_ac_ct_OBJDUMP="$ac_ct_OBJDUMP" # Let the user override the test.
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else
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH
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do
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IFS=$as_save_IFS
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test -z "$as_dir" && as_dir=.
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for ac_exec_ext in '' $ac_executable_extensions; do
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if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
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ac_cv_prog_ac_ct_OBJDUMP="objdump"
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$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
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break 2
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fi
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done
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done
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IFS=$as_save_IFS
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fi
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fi
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ac_ct_OBJDUMP=$ac_cv_prog_ac_ct_OBJDUMP
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if test -n "$ac_ct_OBJDUMP"; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5
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$as_echo "$ac_ct_OBJDUMP" >&6; }
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else
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
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$as_echo "no" >&6; }
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fi
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if test "x$ac_ct_OBJDUMP" = x; then
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OBJDUMP="false"
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else
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case $cross_compiling:$ac_tool_warned in
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yes:)
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{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
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$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
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ac_tool_warned=yes ;;
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esac
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OBJDUMP=$ac_ct_OBJDUMP
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fi
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else
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OBJDUMP="$ac_cv_prog_OBJDUMP"
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fi
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# We need the C++ compiler only for testing.
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ac_ext=cpp
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@ -4580,8 +4672,6 @@ AS=`$CC -print-prog-name=as`
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LD=`$CC -print-prog-name=$LDNAME`
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AR=`$CC -print-prog-name=ar`
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OBJDUMP=`$CC -print-prog-name=objdump`
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OBJCOPY=`$CC -print-prog-name=objcopy`
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GPROF=`$CC -print-prog-name=gprof`
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@ -52,6 +52,7 @@ fi
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AC_SUBST(cross_compiling)
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AC_PROG_CPP
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AC_CHECK_TOOL(READELF, readelf, false)
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AC_CHECK_TOOL(OBJDUMP, objdump, false)
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# We need the C++ compiler only for testing.
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AC_PROG_CXX
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