Ports: Support Serenity install root in PHP's libtool

PHP's libtool does not have sysroot support; this is the minimum change
to get PHP to build.

Ports/php/patches/0001-Build-Disable-pharcmd.patch

@@ -10,7 +10,7 @@ not try to run phar locally.
  1 file changed, 2 insertions(+), 2 deletions(-)
 
 diff --git a/configure.ac b/configure.ac
-index b54abe3..d9a8d0b 100644
+index ee2d248105f6af61540dfde3eb9e7297c515f0ea..6190cfb73f01cc68d439cb99fdfc9f18341a4cd6 100644
 --- a/configure.ac
 +++ b/configure.ac
 @@ -1567,8 +1567,8 @@ CFLAGS="\$(CFLAGS_CLEAN) $standard_libtool_flag"

Ports/php/patches/0002-Build-Force-inet_aton-detection.patch

@@ -11,7 +11,7 @@ and tries to redefine it with its own implementation in
  1 file changed, 1 insertion(+), 2 deletions(-)
 
 diff --git a/configure.ac b/configure.ac
-index d9a8d0b..687c2d8 100644
+index 6190cfb73f01cc68d439cb99fdfc9f18341a4cd6..b5b8bcc21dd2330adbe81bbc5ad0b6ec256b1ce9 100644
 --- a/configure.ac
 +++ b/configure.ac
 @@ -365,8 +365,7 @@ if test "$ac_cv_func_dlopen" = "yes"; then

Ports/php/patches/0003-Build-Patch-Serenity-root-directory-into-libtool.patch

@@ -0,0 +1,33 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jelle Raaijmakers <jelle@gmta.nl>
+Date: Fri, 21 Oct 2022 14:16:37 +0200
+Subject: [PATCH] Build: Patch Serenity root directory into libtool
+
+PHP's libtool does not have sysroot support; this is the minimum change
+to get PHP to build.
+---
+ build/ltmain.sh | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/build/ltmain.sh b/build/ltmain.sh
+index 2f1c8c9dc80f095832c58aeb30ca65fc27e8a64b..cce4f76267a211775ec97eb2b006df536cd4cc7b 100755
+--- a/build/ltmain.sh
++++ b/build/ltmain.sh
+@@ -2353,6 +2353,9 @@ EOF
+ 	  continue
+ 	  ;;
+ 	esac # case $deplib
++	if [ "${lib::1}" == '=' ]; then
++		lib="${SERENITY_INSTALL_ROOT}${lib:1}"
++	fi
+ 	if test "$found" = yes || test -f "$lib"; then :
+ 	else
+ 	  $echo "$modename: cannot find the library \`$lib' or unhandled argument \`$deplib'" 1>&2
+@@ -2469,6 +2472,7 @@ EOF
+ 	laname=`$echo "X$lib" | $Xsed -e 's%^.*/%%'`
+ 
+ 	# Find the relevant object directory and library name.
++	libdir="${SERENITY_INSTALL_ROOT}${libdir}"
+ 	if test "X$installed" = Xyes; then
+ 	  if test ! -f "$libdir/$linklib" && test -f "$abs_ladir/$linklib"; then
+ 	    $echo "$modename: warning: library \`$lib' was moved." 1>&2

Ports/php/patches/ReadMe.md

@@ -15,3 +15,10 @@ For a reason unknown to me, the build system fails to find `inet_aton`
 and tries to redefine it with its own implementation in
 `flock_compat.c`.
 
+## `0003-Build-Patch-Serenity-root-directory-into-libtool.patch`
+
+Build: Patch Serenity root directory into libtool
+
+PHP's libtool does not have sysroot support; this is the minimum change
+to get PHP to build.
+