X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/3bad6a38bb80df39b69ceaa4a3cefc059df5b0a1..0a200527ffe9436d177c839c4bbb0a28e87b862b:/tools/cmake/Modules/FindLibunwind.cmake

diff --git a/tools/cmake/Modules/FindLibunwind.cmake b/tools/cmake/Modules/FindLibunwind.cmake
index f0d47867d7..8ae23e59a5 100644
--- a/tools/cmake/Modules/FindLibunwind.cmake
+++ b/tools/cmake/Modules/FindLibunwind.cmake
@@ -1,95 +1,99 @@
-# Find the libunwind library
+# Search for libunwind and components, both includes and libraries
+#
+# Copyright (C) 2003-2019 The SimGrid Team.
+# This is distributed under the LGPL licence but please contact us for
+# relicensing if you need. This is merely free software, no matter the licence.
 #
-#  LIBUNWIND_FOUND       - True if libunwind was found.
-#  LIBUNWIND_LIBRARIES   - The libraries needed to use libunwind
-#  LIBUNWIND_INCLUDE_DIR - Location of unwind.h and libunwind.h
-
-# This file was downloaded from https://github.com/cmccabe/lksmith/blob/master/cmake_modules/FindLibunwind.cmake
-# Copyright (c) 2011-2012, the Locksmith authors.
-# All rights reserved.
 #
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
+# Input environment variables:
+#    LIBUNWIND_HINT: path to libunwind installation (e.g., /usr)
+#                    (only needed for non-standard installs)
 #
-# Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
+# You can tune the needed components here.
+# TODO: we should take this as a parameter if I knew how to do so.
+
+# SimGrid needs unwind-ptrace on Linux and FreeBSD
+if("${CMAKE_SYSTEM}" MATCHES "Linux|FreeBSD")
+  set(LIBUNWIND_COMPONENTS ${LIBUNWIND_COMPONENTS} unwind-ptrace unwind-generic)
+endif()
+
 #
-# Redistributions in binary form must reproduce the above copyright
-# notice, this list of conditions and the following disclaimer in the
-# documentation and/or other materials provided with the distribution.
+#  Output variables:
+#     HAVE_LIBUNWIND     : if all components were found was found
+#     LIBUNWIND_LIBRARIES: List of all libraries to load (-lunwind -lunwind-x86_64 and such)
 #
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#  Other effects:
+#    - Calls include_directories() on where libunwind.h lives
+#    - Calls link_directories() on where the libs live
 
-# Modified by the SimGrid team for:
-#  - Survive the fact that libunwind cannot be found (setting LIBUNWIND_FOUND correctly)
-#  - Also search for the unwind-ptrace component (but survive when it's not here)
+# Of course also need the core lib
+set(LIBUNWIND_COMPONENTS ${LIBUNWIND_COMPONENTS} "unwind")
 
-set(LIBUNWIND_FOUND "1")
+message(STATUS "Looking for libunwind:")
+# Let's assume we have it, and invalidate if parts are missing
+SET(HAVE_LIBUNWIND 1)
 
-FIND_PATH(LIBUNWIND_INCLUDE_DIR libunwind.h)
-if(NOT LIBUNWIND_INCLUDE_DIR)
-  message(WARNING "failed to find libunwind.h")
-  set(LIBUNWIND_FOUND "")
-elseif(NOT EXISTS "${LIBUNWIND_INCLUDE_DIR}/unwind.h")
-  message(WARNING "libunwind.h was found, but unwind.h was not found in that directory.")
-  set(LIBUNWIND_FOUND "")
-  SET(LIBUNWIND_INCLUDE_DIR "")
-endif()
+#
+# Search for the header file
+#
 
-FIND_LIBRARY(LIBUNWIND_GENERIC_LIBRARY "unwind")
-if (LIBUNWIND_GENERIC_LIBRARY)
-  MESSAGE(STATUS "Found libunwind library: ${LIBUNWIND_GENERIC_LIBRARY}")
+find_path(PATH_LIBUNWIND_H "libunwind.h"
+  HINTS
+    $ENV{LIBUNWIND_HINT}
+    $ENV{LD_LIBRARY_PATH}
+  PATH_SUFFIXES include/ GnuWin32/include
+  PATHS /opt /opt/local /opt/csw /sw /usr)
+if(PATH_LIBUNWIND_H)
+  string(REGEX REPLACE "/libunwind.h"               "" PATH_LIBUNWIND_H   "${PATH_LIBUNWIND_H}")
+  message("   Found libunwind.h in ${PATH_LIBUNWIND_H}")
+  include_directories(${PATH_LIBUNWIND_H})
 else()
-  set(LIBUNWIND_FOUND "")
-  MESSAGE(WARNING "failed to find unwind generic library")
-endif ()
-SET(LIBUNWIND_LIBRARIES ${LIBUNWIND_GENERIC_LIBRARY})
-unset(LIBUNWIND_GENERIC_LIBRARY)
+  message("   NOT FOUND libunwind.h")
+  SET(HAVE_LIBUNWIND 0)
+endif()
+mark_as_advanced(PATH_LIBUNWIND_H)
 
-FIND_LIBRARY(LIBUNWIND_PTRACE_LIBRARY "unwind-ptrace")
-if (LIBUNWIND_PTRACE_LIBRARY)
-  MESSAGE(STATUS "Found libunwind-ptrace library: ${LIBUNWIND_PTRACE_LIBRARY}")
-  SET(LIBUNWIND_LIBRARIES ${LIBUNWIND_LIBRARIES} ${LIBUNWIND_PTRACE_LIBRARY})
-else()
-  MESSAGE(WARNING "Failed to find unwind-ptrace library. Proceeding anyway.")
-endif ()
-unset(LIBUNWIND_PTRACE_LIBRARY)
+#
+# Search for the library components
+#
 
-# For some reason, we have to link to two libunwind shared object files:
-# one arch-specific and one not.
-if (CMAKE_SYSTEM_PROCESSOR MATCHES "^arm")
-    SET(LIBUNWIND_ARCH "arm")
-elseif (CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64" OR CMAKE_SYSTEM_PROCESSOR STREQUAL "amd64")
-    SET(LIBUNWIND_ARCH "x86_64")
-elseif (CMAKE_SYSTEM_PROCESSOR MATCHES "^i.86$")
-    SET(LIBUNWIND_ARCH "x86")
-endif()
+foreach(component ${LIBUNWIND_COMPONENTS})
+  find_library(PATH_LIBUNWIND_LIB_${component}
+    NAMES ${component}
+    HINTS
+      $ENV{LIBUNWIND_HINT}
+      $ENV{LD_LIBRARY_PATH}
+    PATH_SUFFIXES lib/ GnuWin32/lib lib/system
+    PATHS /opt /opt/local /opt/csw /sw /usr /usr/lib/)
+  if(PATH_LIBUNWIND_LIB_${component})
+    # message("     ${component}  ${PATH_LIBUNWIND_LIB_${component}}")
+    string(REGEX REPLACE "/lib${component}.*[.]${LIB_EXE}$" "" PATH_LIBUNWIND_LIB_${component} "${PATH_LIBUNWIND_LIB_${component}}")
+    message("   Found lib${component}.${LIB_EXE} in ${PATH_LIBUNWIND_LIB_${component}}")
+    link_directories(${PATH_LIBUNWIND_LIB_${component}})
 
-if (LIBUNWIND_FOUND AND LIBUNWIND_ARCH)
-    FIND_LIBRARY(LIBUNWIND_SPECIFIC_LIBRARY "unwind-${LIBUNWIND_ARCH}")
-    if (LIBUNWIND_SPECIFIC_LIBRARY)
-        MESSAGE(STATUS "Found libunwind-${LIBUNWIND_ARCH} library: ${LIBUNWIND_SPECIFIC_LIBRARY}")
+    if(${component} STREQUAL "unwind" AND APPLE)
+        # Apple forbids to link directly against its libunwind implementation
+        # So let's comply to that stupid restriction and link against the System framework
+        SET(LIBUNWIND_LIBRARIES "${LIBUNWIND_LIBRARIES} -lSystem")
     else()
-        MESSAGE(FATAL_ERROR "failed to find unwind-${LIBUNWIND_ARCH}")
-	set(LIBUNWIND_FOUND "")
-    endif ()
-    SET(LIBUNWIND_LIBRARIES ${LIBUNWIND_LIBRARIES} ${LIBUNWIND_SPECIFIC_LIBRARY})
-    unset(LIBUNWIND_SPECIFIC_LIBRARY)
-endif()
+        SET(LIBUNWIND_LIBRARIES "${LIBUNWIND_LIBRARIES} -l${component}")
+    endif()
+	
+  else()
+    message("   Looking for lib${component}.${LIB_EXE} - not found")
+    SET(HAVE_LIBUNWIND 0)
+  endif()
+  mark_as_advanced(PATH_LIBUNWIND_LIB_${component})
+endforeach()
+unset(component)
+unset(LIBUNWIND_COMPONENTS)
 
-if (LIBUNWIND_FOUND)
-  MESSAGE(STATUS "Found all required libunwind components.")
+#
+# Conclude and cleanup
+#
+if(HAVE_LIBUNWIND)
+  message(STATUS "Dependencies induced by libunwind: ${LIBUNWIND_LIBRARIES}")
+else()
+  message(STATUS "Some libunwind components are missing")
+  set(LIBUNWIND_LIBRARIES "")
 endif()
-
-MARK_AS_ADVANCED(LIBUNWIND_LIBRARIES LIBUNWIND_INCLUDE_DIR)