From 31cf22cb4b8b7bbff1d69e1f4d2928002a2dc727 Mon Sep 17 00:00:00 2001
From: Hank Anderson <hank.p.anderson@gmail.com>
Date: Tue, 3 Feb 2015 11:07:58 -0600
Subject: [PATCH] Ported OS settings from Makefile.system into new cmake file.

---
 cmake/os.cmake     | 104 +++++++++++++++++++++++++++++++++++++++++++++
 cmake/system.cmake |   6 ++-
 2 files changed, 109 insertions(+), 1 deletion(-)
 create mode 100644 cmake/os.cmake

diff --git a/cmake/os.cmake b/cmake/os.cmake
new file mode 100644
index 000000000..d897a2506
--- /dev/null
+++ b/cmake/os.cmake
@@ -0,0 +1,104 @@
+##
+## Author: Hank Anderson <hank@statease.com>
+## Created: 12/29/14
+## Last Modified: 12/29/14
+## Description: Ported from portion of OpenBLAS/Makefile.system
+##              Detects the OS and sets appropriate variables.
+
+if (${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
+  set(ENV{MACOSX_DEPLOYMENT_TARGET} "10.2") # TODO: should be exported as an env var
+  set(MD5SUM "md5 -r")
+endif ()
+
+if (${CMAKE_SYSTEM_NAME} STREQUAL "FreeBSD")
+  set(MD5SUM "md5 -r")
+endif ()
+
+if (${CMAKE_SYSTEM_NAME} STREQUAL "NetBSD")
+  set(MD5SUM "md5 -n")
+endif ()
+
+if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
+  set(EXTRALIB "${EXTRALIB} -lm")
+  set(NO_EXPRECISION 1)
+endif ()
+
+if (${CMAKE_SYSTEM_NAME} STREQUAL "AIX")
+  set(EXTRALIB "${EXTRALIB} -lm")
+endif ()
+
+# TODO: this is probably meant for mingw, not other windows compilers
+if (${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
+
+  set(NEED_PIC 0)
+  set(NO_EXPRECISION 1)
+
+  set(EXTRALIB "${EXTRALIB} -defaultlib:advapi32")
+
+  # probably not going to use these
+  set(SUFFIX "obj")
+  set(PSUFFIX "pobj")
+  set(LIBSUFFIX "a")
+
+  if (${CMAKE_C_COMPILER_ID} STREQUAL "Clang")
+    set(CCOMMON_OPT	"${CCOMMON_OPT} -DMS_ABI")
+  endif ()
+
+  if (${CMAKE_C_COMPILER_ID} STREQUAL "GNU")
+
+    # Test for supporting MS_ABI
+    # removed string parsing in favor of CMake's version comparison -hpa
+    execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION)
+    if (${GCC_VERSION} VERSION_GREATER 4.7 OR ${GCC_VERSION} VERSION_EQUAL 4.7)
+      # GCC Version >=4.7
+      # It is compatible with MSVC ABI.
+      set(CCOMMON_OPT "${CCOMMON_OPT} -DMS_ABI")
+    endif ()
+  endif ()
+
+  # Ensure the correct stack alignment on Win32
+  # http://permalink.gmane.org/gmane.comp.lib.openblas.general/97
+  if (${CMAKE_SYSTEM_PROCESSOR} STREQUAL "x86")
+    set(CCOMMON_OPT "${CCOMMON_OPT} -mincoming-stack-boundary=2")
+    set(FCOMMON_OPT "${FCOMMON_OPT} -mincoming-stack-boundary=2")
+  endif ()
+  
+endif ()
+
+if (${CMAKE_SYSTEM_NAME} STREQUAL "Interix")
+  set(NEED_PIC 0)
+  set(NO_EXPRECISION 1)
+  
+  set(INTERIX_TOOL_DIR STREQUAL "/opt/gcc.3.3/i586-pc-interix3/bin")
+endif ()
+
+if (CYGWIN)
+  set(NEED_PIC 0)
+  set(NO_EXPRECISION 1)
+endif
+
+if (NOT ${CMAKE_SYSTEM_NAME} STREQUAL "Windows" AND NOT ${CMAKE_SYSTEM_NAME} STREQUAL "Interix")
+  if (SMP)
+    set(EXTRALIB "${EXTRALIB} -lpthread")
+  endif ()
+endif ()
+
+if (QUAD_PRECISION)
+  set(CCOMMON_OPT "${CCOMMON_OPT} -DQUAD_PRECISION")
+  set(NO_EXPRECISION 1)
+endif ()
+
+if (${CMAKE_SYSTEM_PROCESSOR} STREQUAL "x86")
+  set(NO_EXPRECISION 1)
+endif ()
+
+if (UTEST_CHECK)
+  set(CCOMMON_OPT "${CCOMMON_OPT} -DUTEST_CHECK")
+  set(SANITY_CHECK 1)
+endif ()
+
+if (SANITY_CHECK)
+  # TODO: need some way to get $(*F) (target filename)
+  set(CCOMMON_OPT "${CCOMMON_OPT} -DSANITY_CHECK -DREFNAME=$(*F)f${BU}")
+endif
+
diff --git a/cmake/system.cmake b/cmake/system.cmake
index 0753ed028..1d9c4612d 100644
--- a/cmake/system.cmake
+++ b/cmake/system.cmake
@@ -128,5 +128,9 @@ set(DLLWRAP "$(CROSS_SUFFIX)dllwrap")
 set(OBJCOPY "$(CROSS_SUFFIX)objcopy")
 set(OBJCONV "$(CROSS_SUFFIX)objconv")
 
-# TODO: convert rest of Makefile.system, left off at "OS dependent settings"
+
+#
+#  OS dependent settings
+#
+include("${CMAKE_SOURCE_DIR}/cmake/os.cmake")