Workaround for short jump tables on PA-RISC.

The PA-RISC architecture requires special options for GCC to prevent
linker errors when libraries reach a certain size and / or complexity.
See http://mraw.org/blog/2007/10/10/Linking_on_hppa and gcc
documentation on -mlong-calls.

CompileFlags.cmake

@@ -65,6 +65,16 @@ if(CMAKE_SYSTEM_NAME MATCHES "HP-UX" AND CMAKE_CXX_COMPILER_ID MATCHES "HP")
   endif()
 endif()
 
+# Workaround for short jump tables on PA-RISC
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "^parisc")
+  if(CMAKE_COMPILER_IS_GNUC)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mlong-calls")
+  endif()
+  if(CMAKE_COMPILER_IS_GNUCXX)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mlong-calls")
+  endif()
+endif()
+
 # use the ansi CXX compile flag for building cmake
 if (CMAKE_ANSI_CXXFLAGS)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_ANSI_CXXFLAGS}")
@@ -74,10 +84,4 @@ if (CMAKE_ANSI_CFLAGS)
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_ANSI_CFLAGS}")
 endif ()
 
-# avoid binutils problem with large binaries, e.g. when building CMake in debug mode
-# See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50230
-if (CMAKE_SYSTEM_NAME STREQUAL Linux AND CMAKE_SYSTEM_PROCESSOR STREQUAL parisc)
-  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--unique=.text._*")
-endif ()
-
 include (${CMAKE_ROOT}/Modules/CMakeBackwardCompatibilityCXX.cmake)

bootstrap

@@ -122,17 +122,32 @@ else
   cmake_system_openvms=false
 fi
 
+# Determine whether this is HP-UX
+if echo "${cmake_system}" | grep HP-UX >/dev/null 2>&1; then
+  cmake_system_hpux=true
+else
+  cmake_system_hpux=false
+fi
+
 # Determine whether this is Linux
 if echo "${cmake_system}" | grep Linux >/dev/null 2>&1; then
   cmake_system_linux=true
-  # find out if it is a HP PA-RISC machine
+else
+  cmake_system_linux=false
+ fi
+
+# Determine whether this is a PA-RISC machine
+# This only works for Linux or HP-UX, not other PA-RISC OSs (BSD maybe?). Also
+# may falsely detect parisc on HP-UX m68k
+cmake_machine_parisc=false
+if ${cmake_system_linux}; then
   if uname -m | grep parisc >/dev/null 2>&1; then
     cmake_machine_parisc=true
-  else
-    cmake_machine_parisc=false
   fi
-else
-  cmake_system_linux=false
+elif ${cmake_system_hpux}; then
+  if !(uname -m | grep ia64 >/dev/null 2>&1); then
+    cmake_machine_parisc=true
+  fi
 fi
 
 # Choose the generator to use for bootstrapping.
@@ -744,11 +759,13 @@ if ${cmake_system_haiku}; then
   cmake_ld_flags="${LDFLAGS} -lroot -lbe"
 fi
 
-if ${cmake_system_linux}; then
-  # avoid binutils problem with large binaries, e.g. when building CMake in debug mode
-  # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50230
-  if ${cmake_machine_parisc}; then
-    cmake_ld_flags="${LDFLAGS} -Wl,--unique=.text._*"
+# Workaround for short jump tables on PA-RISC
+if ${cmake_machine_parisc}; then
+  if ${cmake_c_compiler_is_gnu}; then
+    cmake_c_flags="${CFLAGS} -mlong-calls"
+  fi
+  if ${cmake_cxx_compiler_is_gnu}; then
+    cmake_cxx_flags="${CXXFLAGS} -mlong-calls"
   fi
 fi