[gettext-libintl] Handle atypical Linux installations (#39662)

Co-authored-by: Lily Wang <v-lilywang@microsoft.com>

ports/gettext-libintl/detect/CMakeLists.txt

@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.20)
+project(find-libintl C)
+
+set(OUTFILE "${CMAKE_CURRENT_BINARY_DIR}/detected_intl.cmake" CACHE FILEPATH "Where to store results")
+
+find_package(Intl)
+find_file(LIBINTL_H NAMES libintl.h PATHS ${Intl_INCLUDE_DIRS})
+
+string(CONFIGURE [[
+set(VCPKG_DETECTED_Intl_FOUND "@Intl_FOUND@")
+set(VCPKG_DETECTED_Intl_IS_BUILT_IN "@Intl_IS_BUILT_IN@")
+set(VCPKG_DETECTED_Intl_INCLUDE_DIRS "@Intl_INCLUDE_DIRS@")
+set(VCPKG_DETECTED_LIBINTL_H "@LIBINTL_H@")
+]] detected_intl @ONLY ESCAPE_QUOTES)
+
+file(WRITE "${OUTFILE}" "${detected_intl}")

ports/gettext-libintl/portfile.cmake

@@ -1,11 +1,22 @@
-if(VCPKG_TARGET_IS_LINUX)
-    set(VCPKG_POLICY_EMPTY_PACKAGE enabled)
-    if(NOT EXISTS "/usr/include/libintl.h")
+if(VCPKG_TARGET_IS_LINUX AND NOT X_VCPKG_FORCE_VCPKG_GETTEXT_LIBINTL)
+    set(detection_results "${CURRENT_BUILDTREES_DIR}/detected-intl-${TARGET_TRIPLET}.cmake.log")
+    file(REMOVE "${detection_results}")
+    block(SCOPE_FOR VARIABLES)
+        set(VCPKG_BUILD_TYPE release)
+        vcpkg_cmake_configure(SOURCE_PATH "${CURRENT_PORT_DIR}/detect" OPTIONS "-DOUTFILE=${detection_results}")
+    endblock()
+    include("${detection_results}")
+    message(STATUS "libintl header: ${VCPKG_DETECTED_LIBINTL_H}")
+    if(NOT VCPKG_DETECTED_LIBINTL_H)
         message(FATAL_ERROR
-            "When targeting Linux, `libintl.h` is expected to come from the C Runtime Library (glibc). "
-            "Please use \"sudo apt-get install libc-dev\" or the equivalent to install development files."
+            "When targeting Linux, `libintl.h` is expected to come from a system package. "
+            "Please use the following commands or the equivalent to install development files.\n"
+            "On Debian and Ubuntu derivatives: \"sudo apt-get install libc-dev\"\n"
+            "On Alpine: \"apk add gettext-dev\"\n"
         )
     endif()
+
+    set(VCPKG_POLICY_EMPTY_PACKAGE enabled)
     file(COPY "${CMAKE_CURRENT_LIST_DIR}/usage" DESTINATION "${CURRENT_PACKAGES_DIR}/share/${PORT}")
     return()
 endif()

ports/gettext-libintl/vcpkg.json

@@ -1,7 +1,7 @@
 {
   "name": "gettext-libintl",
   "version": "0.22.5",
-  "port-version": 1,
+  "port-version": 2,
   "description": "The libintl C library from GNU gettext-runtime.",
   "homepage": "https://www.gnu.org/software/gettext/",
   "license": "LGPL-2.1-or-later",
@@ -10,6 +10,11 @@
     {
       "name": "libiconv",
       "platform": "!linux"
+    },
+    {
+      "name": "vcpkg-cmake",
+      "host": true,
+      "platform": "linux"
     }
   ]
 }

versions/baseline.json

@@ -3022,7 +3022,7 @@
     },
     "gettext-libintl": {
       "baseline": "0.22.5",
-      "port-version": 1
+      "port-version": 2
     },
     "gettimeofday": {
       "baseline": "2017-10-14",

versions/g-/gettext-libintl.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "f41e983c85004eb6ee8d290ecb2465832fce8c00",
+      "version": "0.22.5",
+      "port-version": 2
+    },
     {
       "git-tree": "ac89519d5ec11430978a4e45619befb7a1c4a062",
       "version": "0.22.5",