?X: cc -c +z module_b.c
?X: ld -b module_a.o module_b.o -o module.sl
?X:
-?MAKE:usedl ld dlsrc cccdlflags lddlflags ccdlflags: \
- Getfile Myread test osname sed i_dld d_dlopen Findhdr Setvar \
- cc ccflags ldflags ls gccversion cat rsrc src run i_stdlib
+?MAKE:usedl ld dlsrc cccdlflags lddlflags ccdlflags bin_ELF ld_can_script: \
+ rm_try Getfile Myread test osname sed d_dlopen Findhdr Setvar \
+ src run cc ccflags ldflags optimize ls gccversion cat rsrc i_stdlib \
+ i_unistd osvers sysroot
?MAKE: -pick add $@ %<
?Y:BOTTOM
?S:usedl:
?S: It is up to the makefile to use it. For sunos 4.1, it should
?S: be empty.
?S:.
+?S:bin_ELF:
+?S: This variable saves the result from configure if generated binaries
+?S: are in ELF format. Only set to defined when the test has actually
+?S: been performed, and the result was positive.
+?S:.
+?S:ld_can_script:
+?S: This variable shows if the loader accepts scripts in the form of
+?S: -Wl,--version-script=ld.script. This is currently only supported
+?S: for GNU ld on ELF in dynamic loading builds.
+?S:.
?C:USE_DYNAMIC_LOADING ~ %<:
?C: This symbol, if defined, indicates that dynamic loading of
?C: some sort is available.
?H:.
?W:%<:dlopen
?T:dldir thisflag tdir
+?F:!a.out
: determine which dynamic loading, if any, to compile in
echo " "
dldir="ext/DynaLoader"
case "$usedl" in
-$define|y|true)
+ $define|y|true)
dflt='y'
usedl="$define"
;;
-$undef|n|false)
+ $undef|n|false)
dflt='n'
usedl="$undef"
;;
-*)
+ *)
dflt='n'
case "$d_dlopen" in
$define) dflt='y' ;;
esac
- case "$i_dld" in
- $define) dflt='y' ;;
- esac
: Does a dl_xxx.xs file exist for this operating system
$test -f $rsrc/$dldir/dl_${osname}.xs && dflt='y'
;;
rp="Do you wish to use dynamic loading?"
. ./myread
usedl="$ans"
+bin_ELF="$undef"
case "$ans" in
-y*) usedl="$define"
+ y*) usedl="$define"
case "$dlsrc" in
- '')
- if $test -f $rsrc/$dldir/dl_${osname}.xs ; then
- dflt="$dldir/dl_${osname}.xs"
+ '') if $test -f $rsrc/$dldir/dl_${osname}.xs ; then
+ dflt="$dldir/dl_${osname}.xs"
elif $test "$d_dlopen" = "$define" ; then
- dflt="$dldir/dl_dlopen.xs"
- elif $test "$i_dld" = "$define" ; then
- dflt="$dldir/dl_dld.xs"
+ dflt="$dldir/dl_dlopen.xs"
else
- dflt=''
+ dflt=''
fi
;;
- *) dflt="$dldir/$dlsrc"
+ *) dflt="$dldir/$dlsrc"
;;
esac
- echo "The following dynamic loading files are available:"
+ echo "The following dynamic loading files are available:"
: Can not go over to $dldir because getfile has path hard-coded in.
tdir=`pwd`; cd "$rsrc"; $ls -C $dldir/dl*.xs; cd "$tdir"
rp="Source file to use for dynamic loading"
To use no flags, say "none".
EOM
- case "$cccdlflags" in
- '') case "$gccversion" in
+ case "$cccdlflags" in
+ '') case "$gccversion" in
'') case "$osname" in
hpux) dflt='+z' ;;
- next) dflt='none' ;;
irix*) dflt='-KPIC' ;;
svr4*|esix*|solaris|nonstopux) dflt='-KPIC' ;;
sunos) dflt='-pic' ;;
*) dflt='none' ;;
esac
- ;;
+ ;;
*) case "$osname" in
- darwin) dflt='none' ;;
- svr4*|esix*|solaris|nonstopux) dflt='-fPIC' ;;
+ darwin) dflt='none' ;;
+ *linux*|svr4*|esix*|solaris|nonstopux) dflt='-fPIC' ;;
*) dflt='-fpic' ;;
esac ;;
- esac ;;
- ' ') dflt='none' ;;
- *) dflt="$cccdlflags" ;;
- esac
- rp="Any special flags to pass to $cc -c to compile shared library modules?"
- . ./myread
- case "$ans" in
+ esac ;;
+ ' ') dflt='none' ;;
+ *) dflt="$cccdlflags" ;;
+ esac
+
+ case "$dflt" in
+ none) dflt='' ;;
+ esac
+
+ # If -Dsysroot was specified, now's the time to add it
+ # to cccdlflags
+ if test "X$sysroot" != X; then
+ case "$gccversion" in
+ '') ;;
+ *) case "$dflt" in
+ *sysroot*) ;;
+ 'undef'|*)
+ dflt="$dflt --sysroot=$sysroot" ;;
+ esac
+ ;;
+ esac
+ fi
+
+ case "$dflt" in
+ '') dflt='none';;
+ esac
+
+ rp="Any special flags to pass to $cc -c to compile shared library modules?"
+ . ./myread
+ case "$ans" in
?X: Use ' ' so that a subsequent Configure run preserves the old state.
- none) cccdlflags=' ' ;;
- *) cccdlflags="$ans" ;;
- esac
+ none) cccdlflags=' ' ;;
+ *) cccdlflags="$ans" ;;
+ esac
- cat << EOM
+ cat << EOM
Some systems use ld to create libraries that can be dynamically loaded,
while other systems (such as those using ELF) use $cc.
EOM
- case "$ld" in
- '') $cat >try.c <<EOM
+
+: Determine if this is ELF
+ $cat >try.c <<EOM
/* Test for whether ELF binaries are produced */
#include <fcntl.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
+#$i_unistd I_UNISTD
+#ifdef I_UNISTD
+#include <unistd.h>
+#endif
int main() {
- char b[4];
- int i = open("a.out",O_RDONLY);
- if(i == -1)
- exit(1); /* fail */
- if(read(i,b,4)==4 && b[0]==127 && b[1]=='E' && b[2]=='L' && b[3]=='F')
- exit(0); /* succeed (yes, it's ELF) */
- else
- exit(1); /* fail */
+ char b[4];
+ int i = open("a.out",O_RDONLY);
+ if(i == -1)
+ exit(1); /* fail */
+ if(read(i,b,4)==4 && b[0]==127 && b[1]=='E' && b[2]=='L' && b[3]=='F')
+ exit(0); /* succeed (yes, it is ELF) */
+ exit(1); /* fail */
}
EOM
- if $cc $ccflags $ldflags try.c >/dev/null 2>&1 && $run ./a.out; then
- cat <<EOM
+ if $cc $ccflags $ldflags -o a.out try.c >/dev/null 2>&1 && $run ./a.out; then
+ bin_ELF="$define"
+ fi
+ $rm_try
+
+ case "$ld" in
+ '') if $test $bin_ELF = "$define"; then
+ cat <<EOM
You appear to have ELF support. I'll use $cc to build dynamic libraries.
EOM
- dflt="$cc"
+ dflt="$cc"
else
- echo "I'll use ld to build dynamic libraries."
- dflt='ld'
+ echo "I'll use ld to build dynamic libraries."
+ dflt='ld'
fi
- rm -f try.c a.out
;;
- *) dflt="$ld"
+ *) dflt="$ld"
;;
esac
- rp="What command should be used to create dynamic libraries?"
- . ./myread
+ rp="What command should be used to create dynamic libraries?"
+ . ./myread
ld="$ans"
- cat << EOM
+ cat << EOM
Some systems may require passing special flags to $ld to create a
library that can be dynamically loaded. If your ld flags include
use no flags, say "none".
EOM
- case "$lddlflags" in
- '') case "$osname" in
- beos) dflt='-nostart' ;;
- hpux) dflt='-b';
- case "$gccversion" in
+ case "$lddlflags" in
+ '') case "$osname" in
+ haiku) dflt='-shared' ;;
+ hpux) dflt='-b';
+ case "$gccversion" in
'') dflt="$dflt +vnocompatwarnings" ;;
- esac
- ;;
- linux|irix*) dflt='-shared' ;;
- next) dflt='none' ;;
- solaris) dflt='-G' ;;
- sunos) dflt='-assert nodefinitions' ;;
- svr4*|esix*|nonstopux) dflt="-G $ldflags" ;;
- *) dflt='none' ;;
- esac
- ;;
- *) dflt="$lddlflags" ;;
- esac
+ esac
+ ;;
+ *linux*|irix*|gnu*) dflt="-shared $optimize" ;;
+ solaris) # See [perl #66604].
+ # On Solaris 11, gcc -m64 on amd64
+ # appears not to understand -G. gcc versions at
+ # least as old as 3.4.3 support -shared, so just
+ # use that with Solaris 11 and later, but keep
+ # the old behavior for older Solaris versions.
+ case "$gccversion" in
+ '') dflt='-G' ;;
+ *) case "$osvers" in
+ 2.?|2.10) dflt='-G' ;;
+ *) dflt='-shared' ;;
+ esac
+ ;;
+ esac
+ ;;
+ sunos) dflt='-assert nodefinitions' ;;
+ svr4*|esix*|nonstopux) dflt="-G $ldflags" ;;
+ *) dflt='none' ;;
+ esac
+ ;;
+ *) dflt="$lddlflags" ;;
+ esac
+
+ : Only do this for gcc, since, for example, qcc has no concept
+ : of --sysroot.
+ if $test "X$sysroot" != X; then
+ case "$gccversion" in
+ '') ;;
+ *) dflt="$dflt --sysroot $sysroot" ;;
+ esac
+ fi
: Try to guess additional flags to pick up local libraries.
: Be careful not to append to a plain 'none'
case "$dflt" in
- none) dflt='' ;;
+ none) dflt='' ;;
esac
for thisflag in $ldflags; do
- case "$thisflag" in
+ case "$thisflag" in
-L*|-R*|-Wl,-R*)
- case " $dflt " in
+ case " $dflt " in
*" $thisflag "*) ;;
*) dflt="$dflt $thisflag" ;;
- esac
- ;;
- esac
+ esac
+ ;;
+ esac
done
case "$dflt" in
- ''|' ') dflt='none' ;;
+ ''|' ') dflt='none' ;;
esac
- rp="Any special flags to pass to $ld to create a dynamically loaded library?"
- . ./myread
- case "$ans" in
+ case "$ldflags" in
+ *-fstack-protector-strong*)
+ case "$dflt" in
+ *-fstack-protector-strong*) ;; # Don't add it again
+ *) dflt="$dflt -fstack-protector-strong" ;;
+ esac
+ ;;
+ *-fstack-protector*)
+ case "$dflt" in
+ *-fstack-protector*) ;; # Don't add it again
+ *) dflt="$dflt -fstack-protector" ;;
+ esac
+ ;;
+ esac
+
+ rp="Any special flags to pass to $ld to create a dynamically loaded library?"
+ . ./myread
+ case "$ans" in
?X: Use ' ' so that a subsequent Configure run preserves the old state.
- none) lddlflags=' ' ;;
- *) lddlflags="$ans" ;;
- esac
+ none) lddlflags=' ' ;;
+ *) lddlflags="$ans" ;;
+ esac
cat <<EOM
say "none".
EOM
- case "$ccdlflags" in
- '') case "$osname" in
- linux|hpux) dflt='-Wl,-E' ;;
- next|sunos) dflt='none' ;;
- *) dflt='none' ;;
- esac ;;
- ' ') dflt='none' ;;
- *) dflt="$ccdlflags" ;;
- esac
- rp="Any special flags to pass to $cc to use dynamic linking?"
- . ./myread
- case "$ans" in
+ case "$ccdlflags" in
+ '') case "$osname" in
+ *linux*|hpux|gnu*) dflt='-Wl,-E' ;;
+ sunos) dflt='none' ;;
+ *) dflt='none' ;;
+ esac ;;
+ ' ') dflt='none' ;;
+ *) dflt="$ccdlflags" ;;
+ esac
+ rp="Any special flags to pass to $cc to use dynamic linking?"
+ . ./myread
+ case "$ans" in
?X: Use ' ' so that a subsequent Configure run preserves the old state.
- none) ccdlflags=' ' ;;
- *) ccdlflags="$ans" ;;
- esac
- ;;
+ none) ccdlflags=' ' ;;
+ *) ccdlflags="$ans" ;;
+ esac
+ ;;
?X: End of usedl=y section
-*) usedl="$undef"
+
+ *) usedl="$undef"
ld='ld'
- dlsrc='dl_none.xs'
- lddlflags=''
- ccdlflags=''
- ;;
+ dlsrc='dl_none.xs'
+ lddlflags=''
+ ccdlflags=''
+ ;;
+esac
+
+ld_can_script="$undef"
+case "$bin_ELF$usedl" in
+ $define$define)
+ # Abuse try.h and a.out names for neat cleanup
+ $cat >try.c <<EOM
+void foo() {}
+void bar() {}
+EOM
+ $cat >try.h <<EOM
+LIBTEST_42 {
+ global:
+ foo;
+ local: *;
+ };
+EOM
+ if $cc $cccdlflags $ccdlflags $ccflags \
+ $ldflags $lddlflags -o a.out try.c \
+ -Wl,--version-script=try.h >/dev/null 2>&1 \
+ && $test -s a.out ; then
+ echo "ld supports scripting" >&4
+ ld_can_script="$define"
+ else
+ echo "ld does not support scripting" >&4
+ fi
+ $rm_try
+ ;;
esac
https://perl5.git.perl.org / metaconfig.git / blobdiff