From: Viktor Szakats <commit@vsz.me>
Date: Wed, 3 Sep 2025 12:32:29 +0000 (+0200)
Subject: cmake: add `CURL_CODE_COVERAGE` option
X-Git-Tag: rc-8_17_0-1~332
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=91720b620e802748d2e1629f43e29b76736542f9;p=thirdparty%2Fcurl.git

cmake: add `CURL_CODE_COVERAGE` option

To sync up with the `--enable-code-coverage` `./configure` option.

Ref: https://gcc.gnu.org/onlinedocs/gcc/Invoking-Gcov.html
Ref: https://gcc.gnu.org/onlinedocs/gcc/Cross-profiling.html
Ref: https://clang.llvm.org/docs/SourceBasedCodeCoverage.html

Closes #18468
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0265162e74..ad78c58ed1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -311,6 +311,26 @@ if(CURL_CLANG_TIDY)
   endif()
 endif()
 
+option(CURL_CODE_COVERAGE "Enable code coverage build options" OFF)
+if(CURL_CODE_COVERAGE)
+  if(CMAKE_C_COMPILER_ID STREQUAL "GNU")
+    set(CURL_COVERAGE_MACROS "NDEBUG")
+    set(CURL_COVERAGE_CFLAGS "-O0" "-g" "-fprofile-arcs")
+    if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 4.1)
+      list(APPEND CURL_COVERAGE_CFLAGS "--coverage")
+    else()
+      list(APPEND CURL_COVERAGE_CFLAGS "-ftest-coverage")
+    endif()
+    set(CURL_COVERAGE_LIBS "gcov")
+  elseif(CMAKE_C_COMPILER_ID MATCHES "Clang")
+    set(CURL_COVERAGE_MACROS "NDEBUG")
+    set(CURL_COVERAGE_CFLAGS "-O0" "-g" "-fprofile-instr-generate" "-fcoverage-mapping")
+    set(CURL_COVERAGE_LDFLAGS "-fprofile-instr-generate" "-fcoverage-mapping")
+  else()
+    set(CURL_CODE_COVERAGE OFF)
+  endif()
+endif()
+
 # For debug libs and exes, add "-d" postfix
 if(NOT DEFINED CMAKE_DEBUG_POSTFIX)
   set(CMAKE_DEBUG_POSTFIX "-d")
@@ -1984,6 +2004,9 @@ if(WIN32)
 endif()
 
 list(APPEND CURL_LIBS ${CURL_NETWORK_AND_TIME_LIBS})
+if(CURL_CODE_COVERAGE)
+  list(APPEND CURL_LIBS ${CURL_COVERAGE_LIBS})
+endif()
 
 if(CMAKE_C_COMPILER_ID STREQUAL "MSVC")  # MSVC but exclude clang-cl
   set_property(DIRECTORY APPEND PROPERTY COMPILE_OPTIONS "-MP")  # Parallel compilation
diff --git a/docs/INSTALL-CMAKE.md b/docs/INSTALL-CMAKE.md
index b112e1f8b4..94a19c71c7 100644
--- a/docs/INSTALL-CMAKE.md
+++ b/docs/INSTALL-CMAKE.md
@@ -227,6 +227,7 @@ target_link_libraries(my_target PRIVATE CURL::libcurl)
 - `BUILD_TESTING`:                          Build tests. Default: `ON`
 - `CURL_CLANG_TIDY`:                        Run the build through `clang-tidy`. Default: `OFF`
 - `CURL_CLANG_TIDYFLAGS`:                   Custom options to pass to `clang-tidy`. Default: (empty)
+- `CURL_CODE_COVERAGE`:                     Enable code coverage build options. Default: `OFF`
 - `CURL_COMPLETION_FISH`:                   Install fish completions. Default: `OFF`
 - `CURL_COMPLETION_FISH_DIR`:               Custom fish completion install directory.
 - `CURL_COMPLETION_ZSH`:                    Install zsh completions. Default: `OFF`
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 3476d55b09..7dce3aea87 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -124,6 +124,10 @@ if(SHARE_LIB_OBJECT AND CMAKE_VERSION VERSION_GREATER_EQUAL 3.12)
       set_target_properties(${LIB_OBJECT} PROPERTIES INTERPROCEDURAL_OPTIMIZATION TRUE)
     endif()
   endif()
+  if(CURL_CODE_COVERAGE)
+    set_property(TARGET ${LIB_OBJECT} APPEND PROPERTY COMPILE_DEFINITIONS ${CURL_COVERAGE_MACROS})
+    set_property(TARGET ${LIB_OBJECT} APPEND PROPERTY COMPILE_OPTIONS ${CURL_COVERAGE_CFLAGS})
+  endif()
 
   target_include_directories(${LIB_OBJECT} INTERFACE
     "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
@@ -162,6 +166,10 @@ if(BUILD_STATIC_LIBS)
       set_target_properties(${LIB_STATIC} PROPERTIES INTERPROCEDURAL_OPTIMIZATION TRUE)
     endif()
   endif()
+  if(CURL_CODE_COVERAGE)
+    set_property(TARGET ${LIB_STATIC} APPEND PROPERTY COMPILE_DEFINITIONS ${CURL_COVERAGE_MACROS})
+    set_property(TARGET ${LIB_STATIC} APPEND PROPERTY COMPILE_OPTIONS ${CURL_COVERAGE_CFLAGS})
+  endif()
 
   target_include_directories(${LIB_STATIC} INTERFACE
     "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
@@ -198,6 +206,15 @@ if(BUILD_SHARED_LIBS)
       set_target_properties(${LIB_SHARED} PROPERTIES INTERPROCEDURAL_OPTIMIZATION TRUE)
     endif()
   endif()
+  if(CURL_CODE_COVERAGE)
+    set_property(TARGET ${LIB_SHARED} APPEND PROPERTY COMPILE_DEFINITIONS ${CURL_COVERAGE_MACROS})
+    set_property(TARGET ${LIB_SHARED} APPEND PROPERTY COMPILE_OPTIONS ${CURL_COVERAGE_CFLAGS})
+    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.13)
+      target_link_options(${LIB_SHARED} PRIVATE ${CURL_COVERAGE_LDFLAGS})
+    else()
+      target_link_libraries(${LIB_SHARED} PRIVATE ${CURL_COVERAGE_LDFLAGS})
+    endif()
+  endif()
 
   target_include_directories(${LIB_SHARED} INTERFACE
     "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 37ca979bab..c4b8ebb934 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -129,6 +129,16 @@ if(ENABLE_UNICODE AND MINGW AND NOT MINGW32CE)
   endif()
 endif()
 
+if(CURL_CODE_COVERAGE)
+  set_property(TARGET ${EXE_NAME} APPEND PROPERTY COMPILE_DEFINITIONS ${CURL_COVERAGE_MACROS})
+  set_property(TARGET ${EXE_NAME} APPEND PROPERTY COMPILE_OPTIONS ${CURL_COVERAGE_CFLAGS})
+  if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.13)
+    target_link_options(${EXE_NAME} PRIVATE ${CURL_COVERAGE_LDFLAGS})
+  else()
+    target_link_libraries(${EXE_NAME} PRIVATE ${CURL_COVERAGE_LDFLAGS})
+  endif()
+endif()
+
 ################################################################################
 
 install(TARGETS ${EXE_NAME} EXPORT ${TARGETS_EXPORT_NAME} DESTINATION ${CMAKE_INSTALL_BINDIR})