clang

unvendor

06/using-nix/2a7-cmake.nix

@@ -0,0 +1,51 @@
+{ fetchurl, mkDerivationStage2
+, stage1, static-gnumake, static-binutils, gnugcc10, linux-headers }:
+
+let
+  source-tarball-cmake = fetchurl {
+    # local = /downloads/cmake-3.27.4.tar.gz;
+    url = "https://github.com/Kitware/CMake/releases/download/v3.27.4/cmake-3.27.4.tar.gz";
+    sha256 = "0a905ca8635ca81aa152e123bdde7e54cbe764fdd9a70d62af44cad8b92967af";
+  };
+in
+  mkDerivationStage2 {
+    name = "bootstrap-2a7-cmake";
+    buildInputPaths = [
+      "${stage1.protobusybox}/bin"
+      "${static-gnumake}/wrappers"
+      "${static-binutils}/bin"
+      "${gnugcc10}/bin"
+    ];
+    script = ''
+        mkdir build-dir; cd build-dir
+        export SHELL=${stage1.protobusybox}/bin/ash
+      # unpack:
+        unpack ${source-tarball-cmake}
+      # fixup:
+        sed -i 's|/bin/sh|${stage1.protobusybox}/bin/ash|' bootstrap
+        sed -i 's|__FILE__|"__FILE__"|' \
+          Source/CPack/IFW/cmCPackIFWCommon.h \
+          Source/CPack/cmCPack*.h \
+          Source/cmCTest.h
+      # bundle libraries:
+        # poor man's static linking, a way for cmake to be self-contained later
+        mkdir -p $out/bundled-runtime
+        cp -H ${gnugcc10}/lib/libstdc++.so.6 $out/bundled-runtime/
+        cp -H ${gnugcc10}/lib/libgcc_s.so.1 $out/bundled-runtime/
+      # configure:
+        ash configure \
+          CFLAGS="-DCPU_SETSIZE=128 -D_GNU_SOURCE" \
+          CXXFLAGS="-isystem ${linux-headers}/include" \
+          LDFLAGS="-Wl,-rpath $out/bundled-runtime" \
+          --prefix=$out \
+          --parallel=$NPROC \
+          -- \
+          -DCMAKE_USE_OPENSSL=OFF
+      # build:
+        make -j $NPROC
+      # install:
+        make -j $NPROC install/strip
+      # check for build path leaks:
+        ( ! grep -rF $(pwd) $out )
+    '';
+  }