Bug 1900505 - Work around cmake issue with exporting symbols on Windows. r=firefox-build-system-reviewers,ahochheiden

Differential Revision: https://phabricator.services.mozilla.com/D212766

taskcluster/kinds/fetch/toolchains.yml

@@ -421,12 +421,12 @@ ninja:
         add-prefix: ninja/bin/
 
 cmake:
-    description: cmake 3.25.1
+    description: cmake 3.25.1 source code
     fetch:
         type: static-url
-        url: https://github.com/Kitware/CMake/releases/download/v3.25.1/cmake-3.25.1-windows-x86_64.zip
-        sha256: d93958d87cc9b91983489f0b37a268b03a3c891894d11f5437fa2a5ce94aab24
-        size: 41460154
+        url: https://github.com/Kitware/CMake/releases/download/v3.25.1/cmake-3.25.1.tar.gz
+        sha256: 1c511d09516af493694ed9baf13c55947a36389674d657a2d5e0ccedc6b291d8
+        size: 10561054
         artifact-name: cmake.tar.zst
         strip-components: 1
         add-prefix: cmake/

taskcluster/kinds/toolchain/clang.yml

@@ -432,11 +432,11 @@ win64-clang-17-raw:
     fetches:
         fetch:
             - clang-17
-            - cmake
             - ninja
         toolchain:
             - win64-clang-17-stage1
             - win64-compiler-rt-17
+            - win64-cmake
             - vs-toolchain
             - win64-libxml2
 
@@ -824,10 +824,10 @@ win64-clang-18-raw:
     fetches:
         fetch:
             - clang-18
-            - cmake
             - ninja
         toolchain:
             - win64-clang-18-stage1
+            - win64-cmake
             - win64-compiler-rt-18
             - vs-toolchain
             - win64-libxml2
@@ -1238,10 +1238,10 @@ win64-clang-trunk-raw:
     fetches:
         fetch:
             - clang-trunk
-            - cmake
             - ninja
         toolchain:
             - win64-clang-trunk-stage1
+            - win64-cmake
             - win64-compiler-rt-trunk
             - vs-toolchain
             - win64-libxml2

taskcluster/kinds/toolchain/misc.yml

@@ -589,6 +589,20 @@ windows-rs:
               extract: false
               dest: ../artifacts
 
+win64-cmake:
+    description: "cmake toolchain build"
+    treeherder:
+        symbol: TW64(cmake)
+    run:
+        script: build-cmake.sh
+        toolchain-artifact: public/build/cmake.tar.zst
+    fetches:
+        fetch:
+            - cmake
+        toolchain:
+            - linux64-clang-toolchain
+            - vs-toolchain
+
 win64-libxml2:
     description: "libxml2 toolchain build"
     treeherder:

taskcluster/scripts/misc/build-cmake.sh

@@ -0,0 +1,67 @@
+#!/bin/bash
+set -e -v -x
+
+artifact=$(basename "$TOOLCHAIN_ARTIFACT")
+project=${artifact%.tar.*}
+workspace=$HOME/workspace
+
+cd $MOZ_FETCHES_DIR/cmake
+
+# Work around https://gitlab.kitware.com/cmake/cmake/-/issues/26031
+patch -p1 <<'EOF'
+diff --git a/Source/bindexplib.cxx b/Source/bindexplib.cxx
+index 52e200c24f..07ccf3965c 100644
+--- a/Source/bindexplib.cxx
++++ b/Source/bindexplib.cxx
+@@ -398,7 +398,7 @@ static bool DumpFile(std::string const& nmPath, const char* filename,
+                      std::set<std::string>& symbols,
+                      std::set<std::string>& dataSymbols)
+ {
+-#ifndef _WIN32
++#if 1
+   return DumpFileWithLlvmNm(nmPath, filename, symbols, dataSymbols);
+ #else
+   HANDLE hFile;
+EOF
+
+# Work around https://github.com/llvm/llvm-project/issues/94563
+# The resulting cmake works well enough for our use.
+patch -p1 <<'EOF'
+diff --git a/Source/CMakeLists.txt b/Source/CMakeLists.txt
+index c268a92111..d18f8cf221 100644
+--- a/Source/CMakeLists.txt
++++ b/Source/CMakeLists.txt
+@@ -863,7 +863,6 @@ if(WIN32)
+ 
+     # Add a manifest file to executables on Windows to allow for
+     # GetVersion to work properly on Windows 8 and above.
+-    target_sources(ManifestLib INTERFACE cmake.version.manifest)
+   endif()
+ endif()
+ 
+EOF
+
+export PATH="$MOZ_FETCHES_DIR/clang/bin:$PATH"
+
+cmake \
+  -GNinja \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DCMAKE_C_COMPILER=clang-cl \
+  -DCMAKE_CXX_COMPILER=clang-cl \
+  -DCMAKE_LINKER=lld-link \
+  -DCMAKE_MT=llvm-mt \
+  -DCMAKE_C_FLAGS="-Xclang -ivfsoverlay -Xclang $MOZ_FETCHES_DIR/vs/overlay.yaml -winsysroot $MOZ_FETCHES_DIR/vs" \
+  -DCMAKE_CXX_FLAGS="-GR -EHsc -Xclang -ivfsoverlay -Xclang $MOZ_FETCHES_DIR/vs/overlay.yaml -winsysroot $MOZ_FETCHES_DIR/vs" \
+  -DCMAKE_EXE_LINKER_FLAGS="-winsysroot:$MOZ_FETCHES_DIR/vs" \
+  -DCMAKE_MODULE_LINKER_FLAGS="-winsysroot:$MOZ_FETCHES_DIR/vs" \
+  -DCMAKE_SHARED_LINKER_FLAGS="-winsysroot:$MOZ_FETCHES_DIR/vs" \
+  -DCMAKE_SYSTEM_NAME=Windows \
+  -DCMAKE_MSVC_RUNTIME_LIBRARY=MultiThreaded \
+  -DCMAKE_INSTALL_PREFIX=$workspace/$project \
+  -B $workspace/build
+
+ninja -C $workspace/build -v install
+
+tar -C $workspace -acvf $artifact $project
+mkdir -p $UPLOAD_DIR
+mv $artifact $UPLOAD_DIR