On 12 March 2012 18:10, DJ Delorie <d...@redhat.com> wrote:
>
> Looks OK to me.
I was about to commit this into my svn checkout and then realized the
patch p4 didn't have the changes to configure - So I regenerated it
again and then began a journey into the depths of m4 and autoconf for
a bit before I gave up. Empirically I spotted this odd behaviour with
gcc_GAS_CHECK_FEATURE and comments - Attached are the 2 alternate
patches that I tried and the difference in the configure scripts
themselves . I am no m4 expert but it does look like the m4_substr in
gcc_GAS_CHECK_FEATURE doesn't really like that comment there.
Any ideas anyone ? I must decline any knowledge of m4 at this point
and I don't want to commit this until I understand what's going on
here.
Ramana
- correct-configure-output.txt : Patch where everything looks sane.
- incorrect-configure-output.txt: Patch where everything looks insane.
- Diffs in the configure output : differences in configure files - for
ease of viewing.
Index: configure.ac
===================================================================
--- configure.ac (revision 185343)
+++ configure.ac (working copy)
@@ -4177,7 +4177,8 @@
esac],
[gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
[elf,2,19,52],,
- [.type foo, @gnu_unique_object],,
+ [.type foo, '$target_type_format_char'gnu_unique_object],,
+# We need to unquote above to to use the definition from config.gcc.
# Also check for ld.so support, i.e. glibc 2.11 or higher.
[[if test x$host = x$build -a x$host = x$target &&
ldd --version 2>/dev/null &&
Index: configure
===================================================================
--- configure (revision 185343)
+++ configure (working copy)
@@ -26167,7 +26167,7 @@
then gcc_cv_as_gnu_unique_object=yes
fi
elif test x$gcc_cv_as != x; then
- $as_echo '.type foo, @gnu_unique_object' > conftest.s
+ $as_echo '.type foo, '$target_type_format_char'gnu_unique_object' >
conftest.s
if { ac_try='$gcc_cv_as $gcc_cv_as_flags -o conftest.o conftest.s >&5'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
@@ -26186,7 +26186,8 @@
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_gnu_unique_object"
>&5
$as_echo "$gcc_cv_as_gnu_unique_object" >&6; }
if test $gcc_cv_as_gnu_unique_object = yes; then
- # Also check for ld.so support, i.e. glibc 2.11 or higher.
+ # We need to unquote above to to use the definition from config.gcc.
+# Also check for ld.so support, i.e. glibc 2.11 or higher.
if test x$host = x$build -a x$host = x$target &&
ldd --version 2>/dev/null &&
glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
Index: config.gcc
===================================================================
--- config.gcc (revision 185343)
+++ config.gcc (working copy)
@@ -182,6 +182,11 @@
# the --with-sysroot configure option or the
# --sysroot command line option is used this
# will be relative to the sysroot.
+# target_type_format_char
+# The default character to be used for formatting
+# the attribute in a
+# .type symbol_name, ${t_t_f_c}<property>
+# directive.
# The following variables are used in each case-construct to build up the
# outgoing variables:
@@ -232,6 +237,7 @@
need_64bit_hwint=
need_64bit_isa=
native_system_header_dir=/usr/include
+target_type_format_char='@'
# Don't carry these over build->host->target. Please.
xm_file=
@@ -316,6 +322,7 @@
arm*-*-*)
cpu_type=arm
extra_headers="mmintrin.h arm_neon.h"
+ target_type_format_char='%'
c_target_objs="arm-c.o"
cxx_target_objs="arm-c.o"
extra_options="${extra_options} arm/arm-tables.opt"
Index: configure.ac
===================================================================
--- configure.ac (revision 185343)
+++ configure.ac (working copy)
@@ -4177,7 +4177,8 @@
esac],
[gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
[elf,2,19,52],,
- [.type foo, @gnu_unique_object],,
+# We need to unquote above to to use the definition from config.gcc.
+ [.type foo, '$target_type_format_char'gnu_unique_object],,
# Also check for ld.so support, i.e. glibc 2.11 or higher.
[[if test x$host = x$build -a x$host = x$target &&
ldd --version 2>/dev/null &&
Index: configure
===================================================================
--- configure (revision 185343)
+++ configure (working copy)
@@ -26167,7 +26167,7 @@
then gcc_cv_as_gnu_unique_object=yes
fi
elif test x$gcc_cv_as != x; then
- $as_echo '.type foo, @gnu_unique_object' > conftest.s
+ $as_echo > conftest.s
if { ac_try='$gcc_cv_as $gcc_cv_as_flags -o conftest.o conftest.s >&5'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
Index: config.gcc
===================================================================
--- config.gcc (revision 185343)
+++ config.gcc (working copy)
@@ -182,6 +182,11 @@
# the --with-sysroot configure option or the
# --sysroot command line option is used this
# will be relative to the sysroot.
+# target_type_format_char
+# The default character to be used for formatting
+# the attribute in a
+# .type symbol_name, ${t_t_f_c}<property>
+# directive.
# The following variables are used in each case-construct to build up the
# outgoing variables:
@@ -232,6 +237,7 @@
need_64bit_hwint=
need_64bit_isa=
native_system_header_dir=/usr/include
+target_type_format_char='@'
# Don't carry these over build->host->target. Please.
xm_file=
@@ -316,6 +322,7 @@
arm*-*-*)
cpu_type=arm
extra_headers="mmintrin.h arm_neon.h"
+ target_type_format_char='%'
c_target_objs="arm-c.o"
cxx_target_objs="arm-c.o"
extra_options="${extra_options} arm/arm-tables.opt"
--- configure 2012-03-14 15:20:52.591266022 +0000
+++ configure-correct 2012-03-14 15:20:11.035268052 +0000
@@ -26167,7 +26167,7 @@
then gcc_cv_as_gnu_unique_object=yes
fi
elif test x$gcc_cv_as != x; then
- $as_echo > conftest.s
+ $as_echo '.type foo, '$target_type_format_char'gnu_unique_object' >
conftest.s
if { ac_try='$gcc_cv_as $gcc_cv_as_flags -o conftest.o conftest.s >&5'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
@@ -26186,7 +26186,8 @@
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_gnu_unique_object"
>&5
$as_echo "$gcc_cv_as_gnu_unique_object" >&6; }
if test $gcc_cv_as_gnu_unique_object = yes; then
- # Also check for ld.so support, i.e. glibc 2.11 or higher.
+ # We need to unquote above to to use the definition from config.gcc.
+# Also check for ld.so support, i.e. glibc 2.11 or higher.
if test x$host = x$build -a x$host = x$target &&
ldd --version 2>/dev/null &&
glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
