Merge pull request #262 from AlexanderRichert-NOAA/pic_default

enable PIC as default for static lib

CMakeLists.txt

@@ -21,6 +21,7 @@ option(BUILD_D "Build the 8-byte real version of the library, libip_d.{a,so}" ON
 option(BUILD_8 "Build the 8-byte integer & real version of the library, libip_8.{a,so}" OFF)
 option(BUILD_DEPRECATED "Build deprecated spectral processing functions" OFF)
 option(TEST_TIME_LIMIT "Set timeout for tests" OFF)
+option(CMAKE_POSITION_INDEPENDENT_CODE "Enable PIC" ON)
 option(FTP_TEST_FILES "Fetch and test with files on FTP site." OFF)
 option(TEST_FILES_CACHE "Path to local copy of test data tarball." OFF)