nixpkgs-tests: add basic test for cc-wrapper

pkgs/test/cc-wrapper/cc-main.c

@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main(int argc, char **argv)
+{
+  fprintf(stderr, "ok\n");
+  return 0;
+}

pkgs/test/cc-wrapper/cflags-main.c

@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include <foo.h>
+
+int main(int argc, char **argv)
+{
+  if (foo() != 42)
+    return 1;
+  fprintf(stderr, "ok\n");
+  return 0;
+}

pkgs/test/cc-wrapper/core-foundation-main.c

@@ -0,0 +1,7 @@
+#include <CoreFoundation/CoreFoundation.h>
+
+int main(int argc, char** argv)
+{
+  CFShow(CFSTR("ok"));
+  return 0;
+}

pkgs/test/cc-wrapper/cxx-main.cc

@@ -0,0 +1,7 @@
+#include <iostream>
+
+int main(int argc, char **argv)
+{
+  std::cerr << "ok" << std::endl;
+  return 0;
+}

pkgs/test/cc-wrapper/default.nix

@@ -0,0 +1,45 @@
+{ stdenv }:
+
+let
+  shlib = if stdenv.isDarwin then "dylib" else "so";
+in
+
+stdenv.mkDerivation {
+  name = "cc-wrapper-test";
+
+  buildCommand = ''
+    NIX_DEBUG=1 $CC -v
+    NIX_DEBUG=1 $CXX -v
+
+    printf "checking whether compiler builds valid C binaries... " >&2
+    $CC -o cc-check ${./cc-main.c}
+    ./cc-check
+
+    printf "checking whether compiler builds valid C++ binaries... " >&2
+    $CXX -o cxx-check ${./cxx-main.cc}
+    ./cxx-check
+
+    ${stdenv.lib.optionalString (stdenv.isDarwin && stdenv.cc.isClang) ''
+      printf "checking whether compiler can build with CoreFoundation.framework... " >&2
+      mkdir -p foo/lib
+      $CC -framework CoreFoundation -o core-foundation-check ${./core-foundation-main.c}
+      ./core-foundation-check
+    ''}
+
+    printf "checking whether compiler uses NIX_CFLAGS_COMPILE... " >&2
+    mkdir -p foo/include
+    cp ${./foo.c} foo/include/foo.h
+    NIX_CFLAGS_COMPILE="-Ifoo/include -DVALUE=42" $CC -o cflags-check ${./cflags-main.c}
+    ./cflags-check
+
+    printf "checking whether compiler uses NIX_LDFLAGS... " >&2
+    mkdir -p foo/lib
+    $CC -shared ${stdenv.lib.optionalString stdenv.isDarwin "-Wl,-install_name,@rpath/libfoo.dylib"} -DVALUE=42 -o foo/lib/libfoo.${shlib} ${./foo.c}
+    NIX_LDFLAGS="-L$NIX_BUILD_TOP/foo/lib -rpath $NIX_BUILD_TOP/foo/lib" $CC -lfoo -o ldflags-check ${./ldflags-main.c}
+    ./ldflags-check
+
+    touch $out
+  '';
+
+  meta.platforms = stdenv.lib.platforms.all;
+}

pkgs/test/cc-wrapper/foo.c

@@ -0,0 +1,4 @@
+unsigned int foo(void)
+{
+  return VALUE;
+}

pkgs/test/cc-wrapper/ldflags-main.c

@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+extern unsigned int foo(void);
+
+int main(int argc, char **argv)
+{
+  if (foo() != 42) {
+    return 1;
+  }
+  fprintf(stderr, "ok\n");
+  return 0;
+}

pkgs/top-level/all-packages.nix

@@ -19409,6 +19409,10 @@ with pkgs;
 
   # `recurseIntoAttrs` for sake of hydra, not nix-env
   tests = recurseIntoAttrs {
+    cc-wrapper = callPackage ../test/cc-wrapper { };
+    cc-wrapper-clang = callPackage ../test/cc-wrapper { stdenv = clangStdenv; };
+    cc-wrapper-libcxx = callPackage ../test/cc-wrapper { stdenv = libcxxStdenv; };
+
     macOSSierraShared = callPackage ../test/macos-sierra-shared {};
   };
 }