add basic build environment using CMake

.gitignore

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+build

CMakeLists.txt

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+########################################################################
+# Prevent in-tree builds
+########################################################################
+IF(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
+    MESSAGE(FATAL_ERROR "Prevented in-tree built. This is bad practice.")
+ENDIF(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
+
+########################################################################
+# Project setup
+#######################################################################
+CMAKE_MINIMUM_REQUIRED (VERSION 2.6)
+PROJECT (NEON_MATH)
+ENABLE_TESTING()
+LIST(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules")
+
+ADD_SUBDIRECTORY (src)
+
+# Make sure the compiler can find include files
+include_directories (${NEON_MATH_SOURCE_DIR}/src) 
+
+# Make sure the linker can find the library once it is built. 
+link_directories (${NEON_MATH_BINARY_DIR}/src) 
+

src/CMakeLists.txt

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+########################################################################
+# Build the library from source files
+########################################################################
+SET(math_neon_sources
+    math_acosf.c
+    math_asinf.c
+    math_atan2f.c
+    math_atanf.c
+    math_ceilf.c
+    math_cosf.c
+    math_coshf.c
+    math_expf.c
+    math_fabsf.c
+    math_floorf.c
+    math_fmodf.c
+    math_frexpf.c
+    math_invsqrtf.c
+    math_ldexpf.c
+    math_log10f.c
+    math_logf.c
+    math_mat2.c
+    math_mat3.c
+    math_mat4.c
+    math_modf.c
+    math_powf.c
+    math_runfast.c
+    math_sincosf.c
+    math_sinf.c
+    math_sinfv.c
+    math_sinhf.c
+    math_sqrtf.c
+    math_sqrtfv.c
+    math_tanf.c
+    math_tanhf.c
+    math_vec2.c
+    math_vec3.c
+    math_vec4.c
+)
+
+set(CMAKE_CXX_COMPILER g++)
+set(CMAKE_C_COMPILER  gcc)
+set(CMAKE_CXX_FLAGS "-std=gnu99 -march=armv7-a -mtune=cortex-a8 -mfpu=neon -mfloat-abi=softfp")
+set(CMAKE_C_FLAGS ${CMAKE_CXX_FLAGS}) #same flags for C sources
+
+# Static library (test code can link against this)
+ADD_LIBRARY(math_neon SHARED ${math_neon_sources})
+
+########################################################################
+# Add executables and link to libraries
+########################################################################
+ADD_EXECUTABLE (math_debug math_debug.c)
+TARGET_LINK_LIBRARIES (math_debug math_neon m)