main/libtool: fix a cross compile issue

main/libtool/APKBUILD

@@ -1,23 +1,23 @@
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=libtool
 pkgver=2.4.6
-pkgrel=0
+pkgrel=1
 pkgdesc="A generic library support script"
 arch="all"
 license='GPL'
 url="http://www.gnu.org/software/libtool"
-source="ftp://ftp.gnu.org/pub/gnu/libtool/${pkgname}-${pkgver}.tar.gz"
+source="ftp://ftp.gnu.org/pub/gnu/libtool/${pkgname}-${pkgver}.tar.gz
+	libtool-fix-cross-compile.patch
+	"
 depends="bash libltdl"
-makedepends="m4"
+makedepends="m4 help2man"
 subpackages="libltdl $pkgname-doc"
 options="libtool"
 
-prepare() {
-	cd "$srcdir"/$pkgname-$pkgver
-}
+builddir="$srcdir"/$pkgname-$pkgver
 
 build() {
-	cd "$srcdir"/$pkgname-$pkgver
+	cd "$builddir"
 	./configure \
 		--build=$CBUILD \
 		--host=$CHOST \
@@ -28,7 +28,7 @@ build() {
 }
 
 package() {
-	cd "$srcdir"/$pkgname-$pkgver
+	cd "$builddir"
 	make DESTDIR="$pkgdir" install
 }
 
@@ -39,6 +39,9 @@ libltdl() {
 	mv "$pkgdir/usr/lib/libltdl.so"* "$subpkgdir/usr/lib/"
 }
 
-md5sums="addf44b646ddb4e3919805aa88fa7c5e  libtool-2.4.6.tar.gz"
-sha256sums="e3bd4d5d3d025a36c21dd6af7ea818a2afcd4dfc1ea5a17b39d7854bcd0c06e3  libtool-2.4.6.tar.gz"
-sha512sums="3233d81cb2739a54b840a0a82064eebbfaa4fb442fb993a35d6bd41d8395c51f038c90ae048b9252f172d0a5bbfb4b36e2b13d4477001f9ff7d4124237819a18  libtool-2.4.6.tar.gz"
+md5sums="addf44b646ddb4e3919805aa88fa7c5e  libtool-2.4.6.tar.gz
+3657a65e226879586c29360eac6ae41b  libtool-fix-cross-compile.patch"
+sha256sums="e3bd4d5d3d025a36c21dd6af7ea818a2afcd4dfc1ea5a17b39d7854bcd0c06e3  libtool-2.4.6.tar.gz
+c98362e9b1efd90618813a6901144452dc03f51e6300686bb07e068ac851c245  libtool-fix-cross-compile.patch"
+sha512sums="3233d81cb2739a54b840a0a82064eebbfaa4fb442fb993a35d6bd41d8395c51f038c90ae048b9252f172d0a5bbfb4b36e2b13d4477001f9ff7d4124237819a18  libtool-2.4.6.tar.gz
+aa14cadd70a633520249fa3a6a4c45b309a980380e62dd5982b3ae842c478a77401ad809297fceebd167c167b0a19f380e6a6c295bc75d1029d56d3bf262b209  libtool-fix-cross-compile.patch"

main/libtool/libtool-fix-cross-compile.patch

@@ -0,0 +1,36 @@
+--- libtool-2.4.6.orig/build-aux/ltmain.in
++++ libtool-2.4.6/build-aux/ltmain.in
+@@ -6449,7 +6449,7 @@
+ 	      fi
+ 	    else
+ 	      # We cannot seem to hardcode it, guess we'll fake it.
+-	      add_dir=-L$libdir
++	      add_dir="-L$lt_sysroot$libdir"
+ 	      # Try looking first in the location we're being installed to.
+ 	      if test -n "$inst_prefix_dir"; then
+ 		case $libdir in
+@@ -7628,9 +7628,11 @@
+ 	  test relink = "$opt_mode" || rpath=$compile_rpath$rpath
+ 	  for libdir in $rpath; do
+ 	    if test -n "$hardcode_libdir_flag_spec"; then
++		  func_replace_sysroot "$libdir"
++		  libdir=$func_replace_sysroot_result
++		  func_stripname '=' '' "$libdir"
++		  libdir=$func_stripname_result
+ 	      if test -n "$hardcode_libdir_separator"; then
+-		func_replace_sysroot "$libdir"
+-		libdir=$func_replace_sysroot_result
+ 		if test -z "$hardcode_libdirs"; then
+ 		  hardcode_libdirs=$libdir
+ 		else
+@@ -8360,6 +8362,10 @@
+       hardcode_libdirs=
+       for libdir in $compile_rpath $finalize_rpath; do
+ 	if test -n "$hardcode_libdir_flag_spec"; then
++	  func_replace_sysroot "$libdir"
++	  libdir=$func_replace_sysroot_result
++	  func_stripname '=' '' "$libdir"
++	  libdir=$func_stripname_result
+ 	  if test -n "$hardcode_libdir_separator"; then
+ 	    if test -z "$hardcode_libdirs"; then
+ 	      hardcode_libdirs=$libdir