Moved dependency on libm to avif executables, instead of directly on the library

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 092a4f5..f501f1f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,11 @@
 
 ## [Unreleased]
 
+## [0.3.1] - 2019-07-22
+### Changed
+- Moved dependency on libm to avif executables, instead of directly on the library
+- Minor changes to README examples
+
 ## [0.3.0] - 2019-07-22
 ### Added
 - new CMake option `AVIF_CODEC_AOM` to enable/disable the usage of AOM's codec (default: on)
@@ -96,7 +101,8 @@
 - Constants `AVIF_VERSION`, `AVIF_VERSION_MAJOR`, `AVIF_VERSION_MINOR`, `AVIF_VERSION_PATCH`
 - `avifVersion()` function
 
-[Unreleased]: https://github.com/AOMediaCodec/libavif/compare/v0.3.0...HEAD
+[Unreleased]: https://github.com/AOMediaCodec/libavif/compare/v0.3.1...HEAD
+[0.3.1]: https://github.com/AOMediaCodec/libavif/compare/v0.3.0...v0.3.1
 [0.3.0]: https://github.com/AOMediaCodec/libavif/compare/v0.2.0...v0.3.0
 [0.2.0]: https://github.com/AOMediaCodec/libavif/compare/v0.1.4...v0.2.0
 [0.1.4]: https://github.com/AOMediaCodec/libavif/compare/v0.1.3...v0.1.4

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dbe7139..fe64fe5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -65,14 +65,16 @@
 
 add_library(avif STATIC ${AVIF_SRCS})
 target_link_libraries(avif gb ${AVIF_CODEC_LIBARIES})
+
+set(AVIF_MATH_LIBRARY)
 if(NOT WIN32)
-    target_link_libraries(avif m)
+    set(AVIF_MATH_LIBRARY m)
 endif()
 
 option(AVIF_BUILD_EXAMPLES "Build avif Examples." OFF)
 if(AVIF_BUILD_EXAMPLES)
     add_executable(avif_example1 examples/avif_example1.c)
-    target_link_libraries(avif_example1 avif)
+    target_link_libraries(avif_example1 avif ${AVIF_MATH_LIBRARY})
 endif()
 
 option(AVIF_BUILD_APPS "Build avif apps." OFF)
@@ -83,13 +85,13 @@
         apps/shared/y4m.c
         apps/shared/avifutil.c
     )
-    target_link_libraries(avifenc avif)
+    target_link_libraries(avifenc avif ${AVIF_MATH_LIBRARY})
     add_executable(avifdec
         apps/avifdec.c
         apps/shared/y4m.c
         apps/shared/avifutil.c
     )
-    target_link_libraries(avifdec avif)
+    target_link_libraries(avifdec avif ${AVIF_MATH_LIBRARY})
 endif()
 
 option(AVIF_BUILD_TESTS "Build avif tests (fuzzing)." OFF)
@@ -97,7 +99,7 @@
     add_executable(aviffuzz
         tests/aviffuzz.c
     )
-    target_link_libraries(aviffuzz avif)
+    target_link_libraries(aviffuzz avif ${AVIF_MATH_LIBRARY})
 endif()
 
 macro(avif_set_folder_safe target folder)