From 802b76140d782d1482ddbff676fee6108b1224b5 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Wed, 23 Feb 2022 18:41:34 -0500
Subject: Tests: Extend RunCMake.SymlinkTrees to verify paths passed to
 compiler

Verify that the paths to source files and include directories
are passed to the compiler with the symlinks preserved.
---
 Tests/RunCMake/SymlinkTrees/CMakeLists.txt         | 43 ++++++++++++++++++++++
 Tests/RunCMake/SymlinkTrees/RunCMakeTest.cmake     | 10 +++++
 .../common-separate-exe-build-stdout.txt           |  4 ++
 .../SymlinkTrees/generic-exe-build-stdout.txt      |  4 ++
 4 files changed, 61 insertions(+)
 create mode 100644 Tests/RunCMake/SymlinkTrees/common-separate-exe-build-stdout.txt
 create mode 100644 Tests/RunCMake/SymlinkTrees/generic-exe-build-stdout.txt

diff --git a/Tests/RunCMake/SymlinkTrees/CMakeLists.txt b/Tests/RunCMake/SymlinkTrees/CMakeLists.txt
index d090fea..e16faea 100644
--- a/Tests/RunCMake/SymlinkTrees/CMakeLists.txt
+++ b/Tests/RunCMake/SymlinkTrees/CMakeLists.txt
@@ -7,3 +7,46 @@ get_filename_component(real_source "${CMAKE_SOURCE_DIR}" REALPATH)
 get_filename_component(real_binary "${CMAKE_BINARY_DIR}" REALPATH)
 message(STATUS "real source: '${real_source}'")
 message(STATUS "real binary: '${real_binary}'")
+
+if(RunCMake_TEST MATCHES "-exe")
+  enable_language(C)
+  file(WRITE "${CMAKE_SOURCE_DIR}/source.c" [[
+    #include <stdio.h>
+    #include "source.h"
+    #include "binary.h"
+    extern void print_binary_c(void);
+    extern void print_binary_c(void);
+    void print_source_c(void) {
+      printf("source.c: '%s'\n", __FILE__);
+    }
+    int main(void) {
+      print_source_c();
+      print_source_h();
+      print_binary_c();
+      print_binary_h();
+      return 0;
+    }
+  ]])
+  file(WRITE "${CMAKE_BINARY_DIR}/binary.c" [[
+    #include <stdio.h>
+    void print_binary_c(void) {
+      printf("binary.c: '%s'\n", __FILE__);
+    }
+  ]])
+  file(WRITE "${CMAKE_SOURCE_DIR}/include/source.h" [[
+    void print_source_h(void) {
+      printf("source.h: '%s'\n", __FILE__);
+    }
+  ]])
+  file(WRITE "${CMAKE_BINARY_DIR}/include/binary.h" [[
+    void print_binary_h(void) {
+      printf("binary.h: '%s'\n", __FILE__);
+    }
+  ]])
+  add_executable(exe source.c ${CMAKE_BINARY_DIR}/binary.c)
+  target_include_directories(exe PRIVATE
+    ${CMAKE_SOURCE_DIR}/include
+    ${CMAKE_BINARY_DIR}/include
+    )
+  add_custom_target(print ALL COMMAND exe)
+endif()
diff --git a/Tests/RunCMake/SymlinkTrees/RunCMakeTest.cmake b/Tests/RunCMake/SymlinkTrees/RunCMakeTest.cmake
index 02989ab..72676d2 100644
--- a/Tests/RunCMake/SymlinkTrees/RunCMakeTest.cmake
+++ b/Tests/RunCMake/SymlinkTrees/RunCMakeTest.cmake
@@ -74,6 +74,16 @@ function (run_symlink_test case src bin src_from_bin bin_from_src)
   # Pass relative paths to the source and binary trees.
   set(RunCMake_TEST_VARIANT_DESCRIPTION " -S ../${name}/${src} -B ../${name}/${bin}")
   run_symlink_test_case("${case}" -S "../${name}/${src}" -B "../${name}/${bin}")
+
+  # Verify paths passed to compiler.
+  unset(RunCMake_TEST_VARIANT_DESCRIPTION)
+  run_symlink_test_case("${case}-exe" -S "${src}" -B "${bin}")
+  if (RunCMake_GENERATOR MATCHES "Xcode")
+    # The native build system may pass the real paths.
+    set(RunCMake-stdout-file "generic-exe-build-stdout.txt")
+  endif()
+  set(RunCMake_TEST_OUTPUT_MERGE 1)
+  run_cmake_command("${case}-exe-build" ${CMAKE_COMMAND} --build "${bin}")
 endfunction ()
 
 # Create the following structure:
diff --git a/Tests/RunCMake/SymlinkTrees/common-separate-exe-build-stdout.txt b/Tests/RunCMake/SymlinkTrees/common-separate-exe-build-stdout.txt
new file mode 100644
index 0000000..7f73af2
--- /dev/null
+++ b/Tests/RunCMake/SymlinkTrees/common-separate-exe-build-stdout.txt
@@ -0,0 +1,4 @@
+source.c: '[^']*/Tests/RunCMake/SymlinkTrees/common/source/source.c'
+source.h: '[^']*/Tests/RunCMake/SymlinkTrees/common/source/include/source.h'
+binary.c: '[^']*/Tests/RunCMake/SymlinkTrees/common/binary/binary.c'
+binary.h: '[^']*/Tests/RunCMake/SymlinkTrees/common/binary/include/binary.h'
diff --git a/Tests/RunCMake/SymlinkTrees/generic-exe-build-stdout.txt b/Tests/RunCMake/SymlinkTrees/generic-exe-build-stdout.txt
new file mode 100644
index 0000000..db2173c
--- /dev/null
+++ b/Tests/RunCMake/SymlinkTrees/generic-exe-build-stdout.txt
@@ -0,0 +1,4 @@
+source.c: '[^']*/Tests/RunCMake/SymlinkTrees/[^']*/source.c'
+source.h: '[^']*/Tests/RunCMake/SymlinkTrees/[^']*/include/source.h'
+binary.c: '[^']*/Tests/RunCMake/SymlinkTrees/[^']*/binary.c'
+binary.h: '[^']*/Tests/RunCMake/SymlinkTrees/[^']*/include/binary.h'
-- 
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