Emit debug info for Release builds (#5783)

* Remove unnecessary warnings on windows

* Correctly set debug flags on gcc

* Emit debug info for Release builds

* Perform LTO for relwithdebinfo builds

* Release from release builds not relwithdebinfo

5 files changed, 36 insertions, 71 deletions

diff --git a/.github/workflows/release-linux-glibc-2-17.yml b/.github/workflows/release-linux-glibc-2-17.yml
index 29f6c9bf5..4c9485d1e 100644
--- a/.github/workflows/release-linux-glibc-2-17.yml
+++ b/.github/workflows/release-linux-glibc-2-17.yml
@@ -27,9 +27,9 @@ jobs:
             cd /home/app
             git config --global --add safe.directory /home/app
             cmake --preset default --fresh -DSLANG_SLANG_LLVM_FLAVOR=DISABLE
-            cmake --build --preset releaseWithDebugInfo
-            cpack --preset releaseWithDebugInfo -G ZIP
-            cpack --preset releaseWithDebugInfo -G TGZ
+            cmake --build --preset release
+            cpack --preset release -G ZIP
+            cpack --preset release -G TGZ
 
       - name: Package Slang
         id: package
@@ -38,15 +38,15 @@ jobs:
           version=${triggering_ref#v}
           base=$(pwd)/slang-${version}-linux-x86_64-glibc-2.17
 
-          sudo mv "$(pwd)/build/dist-releaseWithDebugInfo/slang.zip" "${base}.zip"
+          sudo mv "$(pwd)/build/dist-release/slang.zip" "${base}.zip"
           echo "SLANG_BINARY_ARCHIVE_ZIP=${base}.zip" >> "$GITHUB_OUTPUT"
 
-          sudo mv "$(pwd)/build/dist-releaseWithDebugInfo/slang.tar.gz" "${base}.tar.gz"
+          sudo mv "$(pwd)/build/dist-release/slang.tar.gz" "${base}.tar.gz"
           echo "SLANG_BINARY_ARCHIVE_TAR=${base}.tar.gz" >> "$GITHUB_OUTPUT"
 
       - name: File check
         run: |
-          find "build/dist-releaseWithDebugInfo" -print0 ! -iname '*.md' ! -iname '*.h' -type f | xargs -0 file
+          find "build/dist-release" -print0 ! -iname '*.md' ! -iname '*.h' -type f | xargs -0 file
 
       - name: UploadBinary
         uses: softprops/action-gh-release@v1
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 1d435bed8..36e30bec0 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -20,7 +20,7 @@ jobs:
     strategy:
       matrix:
         os: [linux, macos, windows]
-        config: [releaseWithDebugInfo]
+        config: [release]
         platform: [x86_64, aarch64]
         test-category: [smoke]
         include:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 436f8e69d..b6f68b427 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -186,6 +186,12 @@ enum_option(
 )
 
 option(
+    SLANG_ENABLE_RELEASE_DEBUG_INFO
+    "Generate debug info for Release builds"
+    ON
+)
+
+option(
     SLANG_ENABLE_SPLIT_DEBUG_INFO
     "Generate split debug info for debug builds"
     ON
diff --git a/cmake/SlangTarget.cmake b/cmake/SlangTarget.cmake
index 59d12ab7a..45e7cf1e1 100644
--- a/cmake/SlangTarget.cmake
+++ b/cmake/SlangTarget.cmake
@@ -168,7 +168,9 @@ function(slang_add_target dir type)
     # See: https://cmake.org/cmake/help/latest/prop_tgt/INTERPROCEDURAL_OPTIMIZATION.html
     set_target_properties(
         ${target}
-        PROPERTIES INTERPROCEDURAL_OPTIMIZATION_RELEASE TRUE
+        PROPERTIES
+            INTERPROCEDURAL_OPTIMIZATION_RELEASE TRUE
+            INTERPROCEDURAL_OPTIMIZATION_RELWITHDEBINFO TRUE
     )
 
     #
@@ -200,12 +202,26 @@ function(slang_add_target dir type)
             PDB_OUTPUT_DIRECTORY "${output_dir}/${runtime_subdir}"
     )
 
-    if(NOT MSVC)
-        set_target_properties(
+    set(debug_configs "Debug,RelWithDebInfo")
+    if(SLANG_ENABLE_RELEASE_DEBUG_INFO)
+        set(debug_configs "Debug,RelWithDebInfo,Release")
+    endif()
+
+    set_target_properties(
+        ${target}
+        PROPERTIES
+            MSVC_DEBUG_INFORMATION_FORMAT
+                "$<$<CONFIG:${debug_configs}>:Embedded>"
+    )
+    if(MSVC)
+        target_link_options(
+            ${target}
+            PRIVATE "$<$<CONFIG:${debug_configs}>:/DEBUG>"
+        )
+    else()
+        target_compile_options(
             ${target}
-            PROPERTIES
-                COMPILE_OPTIONS
-                    "$<$<CONFIG:Debug,RelWithDebInfo>:-fdebug-prefix-map=${CMAKE_CURRENT_BINARY_DIR}=${output_dir}>"
+            PRIVATE "$<$<CONFIG:${debug_configs}>:-g>"
         )
     endif()
 
@@ -234,70 +250,13 @@ function(slang_add_target dir type)
 
     if(generate_split_debug_info)
         if(MSVC)
-            get_target_property(
-                c_compiler_launcher
-                ${target}
-                C_COMPILER_LAUNCHER
-            )
-            get_target_property(
-                cxx_compiler_launcher
-                ${target}
-                CXX_COMPILER_LAUNCHER
-            )
-
-            if(
-                c_compiler_launcher MATCHES "ccache"
-                OR cxx_compiler_launcher MATCHES "ccache"
-            )
-                message(
-                    WARNING
-                    "(s)ccache detected for target ${target}. Removing launcher as it's incompatible with split debug info compiled with MSVC."
-                )
-                set_target_properties(
-                    ${target}
-                    PROPERTIES C_COMPILER_LAUNCHER "" CXX_COMPILER_LAUNCHER ""
-                )
-            endif()
-
-            get_target_property(
-                msvc_debug_information_format
-                ${target}
-                MSVC_DEBUG_INFORMATION_FORMAT
-            )
-            if(
-                NOT msvc_debug_information_format
-                    MATCHES
-                    "(ProgramDatabase|EditAndContinue)"
-            )
-                message(
-                    WARNING
-                    "Debug format must be ProgramDatabase or EditAndContinue to generate split debug info with MSVC"
-                )
-            endif()
-
             set_target_properties(
                 ${target}
                 PROPERTIES
-                    # While it would be nice to set this here, we don't know if
-                    # the user wants ProgramDatabase or EditAndContinue, so
-                    # just check above
-                    # MSVC_DEBUG_INFORMATION_FORMAT
-                    #     "$<$<CONFIG:Debug,RelWithDebInfo>:ProgramDatabase>"
                     COMPILE_PDB_NAME "${target}"
                     COMPILE_PDB_OUTPUT_DIRECTORY "${output_dir}"
             )
         else()
-            # Common debug flags for GCC/Clang
-            target_compile_options(
-                ${target}
-                PRIVATE
-                    $<$<CONFIG:Debug,RelWithDebInfo>:
-                    -g
-                    -fdebug-prefix-map=${CMAKE_SOURCE_DIR}=.
-                    -fdebug-prefix-map=${CMAKE_BINARY_DIR}=.
-                    >
-            )
-
             if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
                 # macOS - use dsymutil with --flat to create separate debug file
                 add_custom_command(
@@ -582,7 +541,6 @@ function(slang_add_target dir type)
         install(
             FILES ${debug_file}
             DESTINATION ${debug_dest}
-            CONFIGURATIONS Debug RelWithDebInfo
             COMPONENT ${debug_component}
             EXCLUDE_FROM_ALL
             OPTIONAL
diff --git a/docs/building.md b/docs/building.md
index cc7ac6eda..f3b7e9d29 100644
--- a/docs/building.md
+++ b/docs/building.md
@@ -163,6 +163,7 @@ See the [documentation on testing](../tools/slang-test/README.md) for more infor
 | `SLANG_ENABLE_TESTS`              | `TRUE`                     | Enable test targets, requires SLANG_ENABLE_GFX, SLANG_ENABLE_SLANGD and SLANG_ENABLE_SLANGRT |
 | `SLANG_ENABLE_EXAMPLES`           | `TRUE`                     | Enable example targets, requires SLANG_ENABLE_GFX                                            |
 | `SLANG_LIB_TYPE`                  | `SHARED`                   | How to build the slang library                                                               |
+| `SLANG_ENABLE_RELEASE_DEBUG_INFO` | `TRUE`                     | Enable generating debug info for Release configs                                             |
 | `SLANG_ENABLE_SPLIT_DEBUG_INFO`   | `TRUE`                     | Enable generating split debug info for Debug and RelWithDebInfo configs                      |
 | `SLANG_SLANG_LLVM_FLAVOR`         | `FETCH_BINARY_IF_POSSIBLE` | How to set up llvm support                                                                   |
 | `SLANG_SLANG_LLVM_BINARY_URL`     | System dependent           | URL specifying the location of the slang-llvm prebuilt library                               |