From: Albert Astals Cid <aacid@kde.org>
Date: Wed, 19 Oct 2016 12:44:03 +0000
Subject: Fix HAVE_TRUNC cmake check
X-Git-Url: http://quickgit.kde.org/?p=kdelibs.git&a=commitdiff&h=0c642ae95dacf894e50630ffcc1961ad1e4e0322
---
Fix HAVE_TRUNC cmake check

On newer distros the check fails because trunc is ambiguous, so tell sizeof exactly which trunc we're speaking about.

REVIEW: 129119
---


--- a/ConfigureChecks.cmake
+++ b/ConfigureChecks.cmake
@@ -244,7 +244,7 @@
 check_prototype_exists(usleep unistd.h              HAVE_USLEEP_PROTO)
 check_prototype_exists(initgroups "unistd.h;sys/types.h;unistd.h;grp.h" HAVE_INITGROUPS_PROTO)
 check_prototype_exists(setreuid unistd.h            HAVE_SETREUID_PROTO)
-check_prototype_exists(trunc math.h                 HAVE_TRUNC)
+check_prototype_exists(trunc math.h                 HAVE_TRUNC "(double (*)(double))")
 
 # check for existing datatypes
 

--- a/cmake/modules/CheckPrototypeExists.cmake
+++ b/cmake/modules/CheckPrototypeExists.cmake
@@ -21,6 +21,13 @@
 INCLUDE(CheckCXXSourceCompiles)
 
 MACRO (CHECK_PROTOTYPE_EXISTS _SYMBOL _HEADER _RESULT)
+   SET(extra_macro_args ${ARGN})
+   LIST(LENGTH extra_macro_args num_extra_args)
+   SET(_PROTOTYPE "")
+   IF (${num_extra_args} EQUAL 1)
+      LIST(GET extra_macro_args 0 _PROTOTYPE)
+   ENDIF ()
+
    SET(_INCLUDE_FILES)
    FOREACH (it ${_HEADER})
       SET(_INCLUDE_FILES "${_INCLUDE_FILES}#include <${it}>\n")
@@ -31,7 +38,7 @@
 int main()
 {
 #ifndef ${_SYMBOL}
-   int i = sizeof(&${_SYMBOL});
+   int i = sizeof(${_PROTOTYPE}&${_SYMBOL});
 #endif
   return 0;
 }