diff options
Diffstat (limited to 'scripts/trylink')
| -rwxr-xr-x | scripts/trylink | 49 |
1 files changed, 40 insertions, 9 deletions
diff --git a/scripts/trylink b/scripts/trylink index f57a8a160..283edfdbb 100755 --- a/scripts/trylink +++ b/scripts/trylink @@ -47,13 +47,30 @@ try() { } check_cc() { - if $CC $1 -shared -o /dev/null -xc /dev/null > /dev/null 2>&1; then - echo "$1"; + if $CC $1 -shared -o /dev/null -xc /dev/null >/dev/null 2>&1; then + echo "$1"; else - echo "$2"; + echo "$2"; fi } +check_libc_is_glibc() { + local tempname="/tmp/temp.$$.$RANDOM.c" + echo "\ + #include <stdlib.h> + /* Apparently uclibc defines __GLIBC__ (compat trick?). Oh well. */ + #if defined(__GLIBC__) && !defined(__UCLIBC__) + syntax error here + #endif + " >"$tempname" + if $CC "$tempname" -c -o /dev/null >/dev/null 2>&1; then + echo "$2"; + else + echo "$1"; + fi + rm "$tempname" +} + EXE="$1" CC="$2" LDFLAGS="$3" @@ -64,6 +81,20 @@ LDLIBS="$6" # The -Wl,--sort-section option is not supported by older versions of ld SORT_SECTION=`check_cc "-Wl,--sort-section -Wl,alignment" ""` +# Static linking against glibc produces buggy executables +# (glibc does not cope well with ld --gc-sections). +# See sources.redhat.com/bugzilla/show_bug.cgi?id=3400 +# Note that glibc is unsuitable for static linking anyway. +# We are removing -Wl,--gc-sections from link command line. +GC_SECTION=`( +. ./.config +if test x"$CONFIG_STATIC" = x"y"; then + check_libc_is_glibc "" "-Wl,--gc-sections" +else + echo "-Wl,--gc-sections" +fi +)` + # Sanitize lib list (dups, extra spaces etc) LDLIBS=`echo "$LDLIBS" | xargs -n1 | sort | uniq | xargs` @@ -76,7 +107,7 @@ try $CC $LDFLAGS \ -o $EXE \ -Wl,--sort-common \ $SORT_SECTION \ - -Wl,--gc-sections \ + $GC_SECTION \ -Wl,--start-group $O_FILES $A_FILES -Wl,--end-group \ $l_list \ || { @@ -100,7 +131,7 @@ while test "$LDLIBS"; do -o $EXE \ -Wl,--sort-common \ $SORT_SECTION \ - -Wl,--gc-sections \ + $GC_SECTION \ -Wl,--start-group $O_FILES $A_FILES -Wl,--end-group \ $l_list if test $? = 0; then @@ -129,7 +160,7 @@ if ! test -f busybox_ldscript; then -o $EXE \ -Wl,--sort-common \ $SORT_SECTION \ - -Wl,--gc-sections \ + $GC_SECTION \ -Wl,--start-group $O_FILES $A_FILES -Wl,--end-group \ $l_list \ -Wl,--warn-common \ @@ -151,7 +182,7 @@ else -o $EXE \ -Wl,--sort-common \ $SORT_SECTION \ - -Wl,--gc-sections \ + $GC_SECTION \ -Wl,-T -Wl,busybox_ldscript \ -Wl,--start-group $O_FILES $A_FILES -Wl,--end-group \ $l_list \ @@ -207,7 +238,7 @@ if test "$CONFIG_FEATURE_SHARED_BUSYBOX" = y; then -o $EXE \ -Wl,--sort-common \ $SORT_SECTION \ - -Wl,--gc-sections \ + $GC_SECTION \ -Wl,--start-group $O_FILES -Wl,--end-group \ -L"$sharedlib_dir" -lbusybox \ -Wl,--warn-common \ @@ -246,7 +277,7 @@ int main(int argc, char **argv) -o $EXE \ -Wl,--sort-common \ $SORT_SECTION \ - -Wl,--gc-sections \ + $GC_SECTION \ -L"$sharedlib_dir" -lbusybox \ -Wl,--warn-common \ || { |