build: picky warning updates

- cmake: sync some picky gcc warnings with autotools.
- cmake, autotools: add `-Wold-style-definition` for clang too.
- cmake: more precise version info for old clang options.
- cmake: use `IN LISTS` syntax in `foreach()`.

Reviewed-by: Daniel Stenberg
Reviewed-by: Marcel Raad
Closes #12324

diff --git a/CMake/PickyWarnings.cmake b/CMake/PickyWarnings.cmake
index 1310cb4fbe2bce03492804fe121fd40e9a43a39e..8b94956d449653b2a17be7e0b333f6ad0a632e61 100644 (file)
--- a/CMake/PickyWarnings.cmake
+++ b/CMake/PickyWarnings.cmake
@@ -52,8 +52,8 @@ if(PICKY_COMPILER)
     # Assume these options always exist with both clang and gcc.
     # Require clang 3.0 / gcc 2.95 or later.
     list(APPEND WPICKY_ENABLE
-      -Wbad-function-cast                  # clang  3.0  gcc  2.95
-      -Wconversion                         # clang  3.0  gcc  2.95
+      -Wbad-function-cast                  # clang  2.7  gcc  2.95
+      -Wconversion                         # clang  2.7  gcc  2.95
       -Winline                             # clang  1.0  gcc  1.0
       -Wmissing-declarations               # clang  1.0  gcc  2.7
       -Wmissing-prototypes                 # clang  1.0  gcc  1.0
@@ -72,15 +72,16 @@ if(PICKY_COMPILER)
     set(WPICKY_COMMON_OLD
       -Wcast-align                         # clang  1.0  gcc  4.2
       -Wdeclaration-after-statement        # clang  1.0  gcc  3.4
-      -Wempty-body                         # clang  3.0  gcc  4.3
+      -Wempty-body                         # clang  2.7  gcc  4.3
       -Wendif-labels                       # clang  1.0  gcc  3.3
       -Wfloat-equal                        # clang  1.0  gcc  2.96 (3.0)
-      -Wignored-qualifiers                 # clang  3.0  gcc  4.3
+      -Wignored-qualifiers                 # clang  2.8  gcc  4.3
       -Wno-format-nonliteral               # clang  1.0  gcc  2.96 (3.0)
-      -Wno-sign-conversion                 # clang  3.0  gcc  4.3
+      -Wno-sign-conversion                 # clang  2.9  gcc  4.3
       -Wno-system-headers                  # clang  1.0  gcc  3.0
+      -Wold-style-definition               # clang  2.7  gcc  3.4
       -Wstrict-prototypes                  # clang  1.0  gcc  3.3
-      -Wtype-limits                        # clang  3.0  gcc  4.3
+      -Wtype-limits                        # clang  2.7  gcc  4.3
       -Wvla                                # clang  2.8  gcc  4.3
     )
 
@@ -125,6 +126,7 @@ if(PICKY_COMPILER)
       if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.3)
         list(APPEND WPICKY_ENABLE
           ${WPICKY_COMMON_OLD}
+          -Wclobbered                      #             gcc  4.3
           -Wmissing-parameter-type         #             gcc  4.3
           -Wold-style-declaration          #             gcc  4.3
           -Wstrict-aliasing=3              #             gcc  4.0
@@ -159,7 +161,7 @@ if(PICKY_COMPILER)
           -Walloc-zero                     #             gcc  7.0
           -Wduplicated-branches            #             gcc  7.0
           -Wformat-overflow=2              #             gcc  7.0
-          -Wformat-truncation=1            #             gcc  7.0
+          -Wformat-truncation=2            #             gcc  7.0
           -Wrestrict                       #             gcc  7.0
         )
       endif()
@@ -174,11 +176,11 @@ if(PICKY_COMPILER)
 
     unset(WPICKY)
 
-    foreach(_CCOPT ${WPICKY_ENABLE})
+    foreach(_CCOPT IN LISTS WPICKY_ENABLE)
       set(WPICKY "${WPICKY} ${_CCOPT}")
     endforeach()
 
-    foreach(_CCOPT ${WPICKY_DETECT})
+    foreach(_CCOPT IN LISTS WPICKY_DETECT)
       # surprisingly, CHECK_C_COMPILER_FLAG needs a new variable to store each new
       # test result in.
       string(MAKE_C_IDENTIFIER "OPT${_CCOPT}" _optvarname)

diff --git a/m4/curl-compilers.m4 b/m4/curl-compilers.m4
index 1b5f6204f463ac788def2660698bc1ccb8f07616..6ad9ef2ac5457dd26816071c737ea817fcc6bc65 100644 (file)
--- a/m4/curl-compilers.m4
+++ b/m4/curl-compilers.m4
@@ -764,6 +764,7 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
           CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [inline nested-externs])
           CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-declarations])
           CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-prototypes])
+          CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [old-style-definition])
           tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long"
           CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [float-equal])
           CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [no-multichar sign-compare])