c_import: extract behavior tests that use @cImport

This introduces the new test step `test-c-import`, and removes the
ability of the behavior tests to `@cImport` paths relative to `test`.
This allows the behavior tests to be run without translate c.

build.zig

@@ -471,6 +471,7 @@ pub fn build(b: *std.Build) !void {
         .name = "behavior",
         .desc = "Run the behavior tests",
         .optimize_modes = optimization_modes,
+        .include_paths = &.{},
         .skip_single_threaded = skip_single_threaded,
         .skip_non_native = skip_non_native,
         .skip_cross_glibc = skip_cross_glibc,
@@ -478,12 +479,26 @@ pub fn build(b: *std.Build) !void {
         .max_rss = 1 * 1024 * 1024 * 1024,
     }));
 
+    test_step.dependOn(tests.addModuleTests(b, .{
+        .test_filter = test_filter,
+        .root_src = "test/c_import.zig",
+        .name = "c-import",
+        .desc = "Run the @cImport tests",
+        .optimize_modes = optimization_modes,
+        .include_paths = &.{"test/c_import"},
+        .skip_single_threaded = true,
+        .skip_non_native = skip_non_native,
+        .skip_cross_glibc = skip_cross_glibc,
+        .skip_libc = skip_libc,
+    }));
+
     test_step.dependOn(tests.addModuleTests(b, .{
         .test_filter = test_filter,
         .root_src = "lib/compiler_rt.zig",
         .name = "compiler-rt",
         .desc = "Run the compiler_rt tests",
         .optimize_modes = optimization_modes,
+        .include_paths = &.{},
         .skip_single_threaded = true,
         .skip_non_native = skip_non_native,
         .skip_cross_glibc = skip_cross_glibc,
@@ -496,6 +511,7 @@ pub fn build(b: *std.Build) !void {
         .name = "universal-libc",
         .desc = "Run the universal libc tests",
         .optimize_modes = optimization_modes,
+        .include_paths = &.{},
         .skip_single_threaded = true,
         .skip_non_native = skip_non_native,
         .skip_cross_glibc = skip_cross_glibc,
@@ -527,6 +543,7 @@ pub fn build(b: *std.Build) !void {
         .name = "std",
         .desc = "Run the standard library tests",
         .optimize_modes = optimization_modes,
+        .include_paths = &.{},
         .skip_single_threaded = skip_single_threaded,
         .skip_non_native = skip_non_native,
         .skip_cross_glibc = skip_cross_glibc,

ci/aarch64-linux-debug.sh

@@ -99,11 +99,11 @@ unset CXX
 
 ninja install
 
-stage3/bin/zig test ../test/behavior.zig -I../test
+stage3/bin/zig test ../test/behavior.zig
 stage3/bin/zig build -p stage4 \
   -Dstatic-llvm \
   -Dtarget=native-native-musl \
   -Dno-lib \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$(pwd)/../lib"
-stage4/bin/zig test ../test/behavior.zig -I../test
+stage4/bin/zig test ../test/behavior.zig

ci/aarch64-linux-release.sh

@@ -99,11 +99,11 @@ unset CXX
 
 ninja install
 
-stage3/bin/zig test ../test/behavior.zig -I../test
+stage3/bin/zig test ../test/behavior.zig
 stage3/bin/zig build -p stage4 \
   -Dstatic-llvm \
   -Dtarget=native-native-musl \
   -Dno-lib \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$(pwd)/../lib"
-stage4/bin/zig test ../test/behavior.zig -I../test
+stage4/bin/zig test ../test/behavior.zig

ci/x86_64-linux-debug.sh

@@ -25,8 +25,7 @@ rm -rf zig-out
 cc -o bootstrap bootstrap.c
 ./bootstrap
 ./zig2 build -Dno-lib
-# In order to run these behavior tests we need to move the `@cImport` ones to somewhere else.
-# ./zig-out/bin/zig test test/behavior.zig
+./zig-out/bin/zig test test/behavior.zig
 
 export CC="$ZIG cc -target $TARGET -mcpu=$MCPU"
 export CXX="$ZIG c++ -target $TARGET -mcpu=$MCPU"
@@ -108,11 +107,11 @@ unset CXX
 
 ninja install
 
-stage3/bin/zig test ../test/behavior.zig -I../test
+stage3/bin/zig test ../test/behavior.zig
 stage3/bin/zig build -p stage4 \
   -Dstatic-llvm \
   -Dtarget=native-native-musl \
   -Dno-lib \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$(pwd)/../lib"
-stage4/bin/zig test ../test/behavior.zig -I../test
+stage4/bin/zig test ../test/behavior.zig

ci/x86_64-linux-release.sh

@@ -25,8 +25,7 @@ rm -rf zig-out
 cc -o bootstrap bootstrap.c
 ./bootstrap
 ./zig2 build -Dno-lib
-# In order to run these behavior tests we need to move the `@cImport` ones to somewhere else.
-# ./zig-out/bin/zig test test/behavior.zig
+./zig-out/bin/zig test test/behavior.zig
 
 export CC="$ZIG cc -target $TARGET -mcpu=$MCPU"
 export CXX="$ZIG c++ -target $TARGET -mcpu=$MCPU"
@@ -125,11 +124,11 @@ unset CXX
 
 ninja install
 
-stage3/bin/zig test ../test/behavior.zig -I../test
+stage3/bin/zig test ../test/behavior.zig
 stage3/bin/zig build -p stage4 \
   -Dstatic-llvm \
   -Dtarget=native-native-musl \
   -Dno-lib \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$(pwd)/../lib"
-stage4/bin/zig test ../test/behavior.zig -I../test
+stage4/bin/zig test ../test/behavior.zig

ci/x86_64-macos-release.sh

@@ -31,8 +31,7 @@ rm -rf zig-out
 cc -o bootstrap bootstrap.c
 ./bootstrap
 ./zig2 build -Dno-lib
-# In order to run these behavior tests we need to move the `@cImport` ones to somewhere else.
-# ./zig-out/bin/zig test test/behavior.zig
+./zig-out/bin/zig test test/behavior.zig
 
 rm -rf build
 mkdir build

ci/x86_64-windows-debug.ps1

@@ -66,8 +66,6 @@ Write-Output "Build x86_64-windows-msvc behavior tests using the C backend..."
 & "stage3-debug\bin\zig.exe" test `
   ..\test\behavior.zig `
   --zig-lib-dir "$ZIG_LIB_DIR" `
-  -I..\test `
-  -I..\lib `
   -ofmt=c `
   -femit-bin="test-x86_64-windows-msvc.c" `
   --test-no-exec `

ci/x86_64-windows-release.ps1

@@ -65,8 +65,6 @@ Write-Output "Build x86_64-windows-msvc behavior tests using the C backend..."
 & "stage3-release\bin\zig.exe" test `
   ..\test\behavior.zig `
   --zig-lib-dir "$ZIG_LIB_DIR" `
-  -I..\test `
-  -I..\lib `
   -ofmt=c `
   -femit-bin="test-x86_64-windows-msvc.c" `
   --test-no-exec `

test/behavior.zig

@@ -14,7 +14,6 @@ test {
     _ = @import("behavior/bool.zig");
     _ = @import("behavior/byteswap.zig");
     _ = @import("behavior/byval_arg_var.zig");
-    _ = @import("behavior/c_char_signedness.zig");
     _ = @import("behavior/call.zig");
     _ = @import("behavior/call_tail.zig");
     _ = @import("behavior/cast.zig");
@@ -92,7 +91,6 @@ test {
     _ = @import("behavior/switch_prong_implicit_cast.zig");
     _ = @import("behavior/this.zig");
     _ = @import("behavior/threadlocal.zig");
-    _ = @import("behavior/translate_c_macros.zig");
     _ = @import("behavior/truncate.zig");
     _ = @import("behavior/try.zig");
     _ = @import("behavior/tuple.zig");

test/c_import.zig

@@ -0,0 +1,4 @@
+test {
+    _ = @import("c_import/c_char_signedness.zig");
+    _ = @import("c_import/macros.zig");
+}

test/c_import/macros.zig

@@ -4,8 +4,8 @@ const expect = std.testing.expect;
 const expectEqual = std.testing.expectEqual;
 const expectEqualStrings = std.testing.expectEqualStrings;
 
-const h = @cImport(@cInclude("behavior/translate_c_macros.h"));
-const latin1 = @cImport(@cInclude("behavior/translate_c_macros_not_utf8.h"));
+const h = @cImport(@cInclude("macros.h"));
+const latin1 = @cImport(@cInclude("macros_not_utf8.h"));
 
 test "casting to void with a macro" {
     if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO

test/tests.zig

@@ -1037,6 +1037,7 @@ const ModuleTestOptions = struct {
     name: []const u8,
     desc: []const u8,
     optimize_modes: []const OptimizeMode,
+    include_paths: []const []const u8,
     skip_single_threaded: bool,
     skip_non_native: bool,
     skip_cross_glibc: bool,
@@ -1140,7 +1141,7 @@ pub fn addModuleTests(b: *std.Build, options: ModuleTestOptions) *Step {
         const use_lld = if (test_target.use_lld == false) "-no-lld" else "";
         const use_pic = if (test_target.pic == true) "-pic" else "";
 
-        these_tests.addIncludePath(.{ .path = "test" });
+        for (options.include_paths) |include_path| these_tests.addIncludePath(.{ .path = include_path });
 
         if (target.os.tag == .wasi) {
             // WASI's default stack size can be too small for some big tests.