From 0756ef643491493903bb7b673b2f744e78d695ca Mon Sep 17 00:00:00 2001
From: Hugues Delorme <delorme.hugues@fougsys.fr>
Date: Fri, 3 Apr 2015 23:58:58 +0200
Subject: [PATCH] cmake: fix detection of powf() with GCC

---
 CMakeLists.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 379ca30..8d70100 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -59,7 +59,13 @@ check_include_files(stdint.h GMIO_HAVE_STDINT_H)
 if(NOT BUILD_STRICT_C90)
     # Check C99 features
     check_function_exists(strtof GMIO_HAVE_STRTOF_FUNC)
+
+    if(CMAKE_COMPILER_IS_GNUCC)
+        list(APPEND CMAKE_REQUIRED_LIBRARIES m) # -lm
+    endif()
     check_function_exists(powf GMIO_HAVE_POWF_FUNC)
+    set(CMAKE_REQUIRED_LIBRARIES)
+
     check_include_files(stdbool.h GMIO_HAVE_STDBOOL_H)
 
     # Check POSIX features