1 files changed, 127 insertions, 0 deletions
diff --git a/3rdparty/plibsys/cmake/VisibilityDetect.cmake b/3rdparty/plibsys/cmake/VisibilityDetect.cmake
new file mode 100644
index 0000000..cbf23cd
--- /dev/null
+++ b/3rdparty/plibsys/cmake/VisibilityDetect.cmake
@@ -0,0 +1,127 @@
+# The MIT License
+#
+# Copyright (C) 2018 Alexander Saprykin <saprykin.spb@gmail.com>
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# 'Software'), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+function (plibsys_detect_visibility cflags ldflags)
+        if (WIN32 OR CYGWIN OR MSYS)
+            set (${cflags} "" PARENT_SCOPE)
+            set (${ldflags} "" PARENT_SCOPE)
+            return()
+        endif()
+
+        # Check GCC
+        check_c_source_compiles ("int main () {
+                                        #if (__GNUC__ >= 4)   && !defined(_CRAYC) && \\\\
+                                            !defined(__sun)   && !defined(sun)    && \\\\
+                                            !defined(__hpux)  && !defined(hpux)   && \\\\
+                                            !defined(__sgi)   && !defined(sgi)    && \\\\
+                                            !defined(__osf__) && !defined(__osf)  && \\\\
+                                            !defined(__OS2__)                        \\\\
+                                            !defined(_AIX)   && !defined(__CYGWIN__) && !defined(__MSYS__)
+                                        return 0;
+                                        #else
+                                        stop_compile_here
+                                        #endif
+                                 }"
+                                 PLIBSYS_HAS_GCC_VISIBILITY
+        )
+
+        if (PLIBSYS_HAS_GCC_VISIBILITY)
+                set (${cflags} "-fvisibility=hidden" PARENT_SCOPE)
+                set (${ldflags} "" PARENT_SCOPE)
+                return()
+        endif()
+
+        # Check Sun Studio
+        check_c_source_compiles ("int main () {
+                                        #if (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x550)) || \\\\
+                                            (defined(__SUNPRO_CC) && (__SUNPRO_CC >= 0x5110))
+                                        return 0;
+                                        #else
+                                        stop_compile_here
+                                        #endif
+                                 }"
+                                 PLIBSYS_HAS_SUN_VISIBILITY
+        )
+
+        if (PLIBSYS_HAS_SUN_VISIBILITY)
+                set (${cflags} "" PARENT_SCOPE)
+                set (${ldlags} "-xldscope=__hidden" PARENT_SCOPE)
+                return()
+        endif()
+
+        # Check IBM XL C
+        check_c_source_compiles ("int main () {
+                                        #if (defined(__xlC__) && (__xlC__ >= 0x0D01))
+                                        return 0;
+                                        #else
+                                        stop_compile_here
+                                        #endif
+                                 }"
+                                 PLIBSYS_HAS_XLC_VISIBILITY
+        )
+
+        if (PLIBSYS_HAS_XLC_VISIBILITY)
+                set (${cflags} "-qvisibility=hidden" PARENT_SCOPE)
+                set (${ldflags} "" PARENT_SCOPE)
+                return()
+        endif()
+
+        # Check HP C/aC++
+        check_c_source_compiles ("int main () {
+                                        #if (defined(__HP_cc)  && (__HP_cc >= 0x061500)) || \\\\
+                                            (defined(__HP_aCC) && (__HP_aCC >= 0x061500))
+                                        return 0;
+                                        #else
+                                        stop_compile_here
+                                        #endif
+                                 }"
+                                 PLIBSYS_HAS_HP_VISIBILITY
+        )
+
+        if (PLIBSYS_HAS_HP_VISIBILITY)
+                set (${cflags} "-Bhidden" PARENT_SCOPE)
+                set (${ldflags} "" PARENT_SCOPE)
+                return()
+        endif()
+
+        # Check Clang
+        check_c_source_compiles ("int main () {
+                                        #if defined(__has_attribute) && __has_attribute(visibility)
+                                        return 0;
+                                        #else
+                                        stop_compile_here
+                                        #endif
+                                 }"
+                                 PLIBSYS_HAS_CLANG_VISIBILITY
+        )
+
+        if (PLIBSYS_HAS_CLANG_VISIBILITY)
+                set (${cflags} "-fvisibility=hidden" PARENT_SCOPE)
+                set (${ldflags} "" PARENT_SCOPE)
+                return()
+        endif()
+
+        # Empty result
+        set (${cflags} "" PARENT_SCOPE)
+        set (${ldflags} "" PARENT_SCOPE)
+endfunction (plibsys_detect_visibility)