diff --git a/CompileFlags.cmake b/CompileFlags.cmake
index ec9b31bd91010a3c3eedf556f938c70905b35dee..5d0e14493d2939c49636f1dbd42a9de695fc9afc 100644
--- a/CompileFlags.cmake
+++ b/CompileFlags.cmake
@@ -28,13 +28,6 @@ if(CMAKE_SYSTEM_NAME MATCHES "AIX")
   endif()
 endif()
 
-if(CMAKE_SYSTEM_NAME MATCHES "IRIX")
-  if(NOT CMAKE_COMPILER_IS_GNUCXX)
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,-woff84 -no_auto_include")
-    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-woff15")
-  endif()
-endif()
-
 if(CMAKE_SYSTEM MATCHES "OSF1-V")
   if(NOT CMAKE_COMPILER_IS_GNUCXX)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -timplicit_local -no_implicit_include ")
diff --git a/Modules/CMakeBackwardCompatibilityCXX.cmake b/Modules/CMakeBackwardCompatibilityCXX.cmake
index 628b541388c28a1476b4ead8e481453f3ae4632a..02744a98504494505886ce14ae4d94c3dc848c28 100644
--- a/Modules/CMakeBackwardCompatibilityCXX.cmake
+++ b/Modules/CMakeBackwardCompatibilityCXX.cmake
@@ -22,9 +22,6 @@ if(NOT CMAKE_SKIP_COMPATIBILITY_TESTS)
   if(NOT CMAKE_COMPILER_IS_GNUCXX)
     include(TestCXXAcceptsFlag)
     set(CMAKE_TRY_ANSI_CXX_FLAGS "")
-    if(CMAKE_SYSTEM_NAME MATCHES "IRIX")
-      set(CMAKE_TRY_ANSI_CXX_FLAGS "-LANG:std")
-    endif()
     if(CMAKE_SYSTEM_NAME MATCHES "OSF")
       set(CMAKE_TRY_ANSI_CXX_FLAGS "-std strict_ansi -nopure_cname")
     endif()
diff --git a/Modules/CMakeCompilerABI.h b/Modules/CMakeCompilerABI.h
index 6f36b03035972f66b92c9a0058a0e68c35fd9269..45532afdb33e508089b879aabfaff69a9c2bc0f6 100644
--- a/Modules/CMakeCompilerABI.h
+++ b/Modules/CMakeCompilerABI.h
@@ -10,16 +10,10 @@ const char info_sizeof_dptr[] = {
 };
 
 /* Application Binary Interface.  */
-#if defined(__sgi) && defined(_ABIO32)
-#  define ABI_ID "ELF O32"
-#elif defined(__sgi) && defined(_ABIN32)
-#  define ABI_ID "ELF N32"
-#elif defined(__sgi) && defined(_ABI64)
-#  define ABI_ID "ELF 64"
 
 /* Check for (some) ARM ABIs.
  * See e.g. http://wiki.debian.org/ArmEabiPort for some information on this. */
-#elif defined(__GNU__) && defined(__ELF__) && defined(__ARM_EABI__)
+#if defined(__GNU__) && defined(__ELF__) && defined(__ARM_EABI__)
 #  define ABI_ID "ELF ARMEABI"
 #elif defined(__GNU__) && defined(__ELF__) && defined(__ARMEB__)
 #  define ABI_ID "ELF ARM"
diff --git a/Modules/CMakeCompilerIdDetection.cmake b/Modules/CMakeCompilerIdDetection.cmake
index f2d43b68762c8d3814eccea6e6a213a3494d77f0..9b2a91fc4e18bd83e796f46050b7e93b7ef1f5b5 100644
--- a/Modules/CMakeCompilerIdDetection.cmake
+++ b/Modules/CMakeCompilerIdDetection.cmake
@@ -135,9 +135,6 @@ function(compiler_id_detection outvar lang)
 /* These compilers are either not known or too old to define an
   identification macro.  Try to identify the platform and guess that
   it is the native compiler.  */
-#elif defined(__sgi)
-# define ${CID_PREFIX}COMPILER_ID \"MIPSpro\"
-
 #elif defined(__hpux) || defined(__hpua)
 # define ${CID_PREFIX}COMPILER_ID \"HP\"
 
diff --git a/Modules/CMakeDetermineSystem.cmake b/Modules/CMakeDetermineSystem.cmake
index 600d5580e197b90d0eddd7e472bc3a4dfe6e71a8..dc208c600d14ca059370c725583e66565cbd833d 100644
--- a/Modules/CMakeDetermineSystem.cmake
+++ b/Modules/CMakeDetermineSystem.cmake
@@ -13,7 +13,6 @@
 # BSD/OS                        BSD/OS
 # FreeBSD                       FreeBSD
 # HP-UX                         HP-UX
-# IRIX                          IRIX
 # Linux                         Linux
 # GNU/kFreeBSD                  GNU/kFreeBSD
 # NetBSD                        NetBSD
diff --git a/Modules/CMakeFortranCompilerABI.F b/Modules/CMakeFortranCompilerABI.F
index b34c284843262fd0d62e32ffd100c176cd878a8a..f4a5489a142dceef8fa0973ff9daa41bb3b75582 100644
--- a/Modules/CMakeFortranCompilerABI.F
+++ b/Modules/CMakeFortranCompilerABI.F
@@ -33,13 +33,7 @@
 #if 0
 ! Application Binary Interface
 #endif
-#if defined(__sgi) && defined(_ABIO32)
-        PRINT *, 'INFO:abi[ELF O32]'
-#elif defined(__sgi) && defined(_ABIN32)
-        PRINT *, 'INFO:abi[ELF N32]'
-#elif defined(__sgi) && defined(_ABI64)
-        PRINT *, 'INFO:abi[ELF 64]'
-#elif defined(__ELF__)
+#if defined(__ELF__)
         PRINT *, 'INFO:abi[ELF]'
 #endif
         PRINT *, 'ABI Detection'
diff --git a/Modules/CMakeFortranCompilerId.F.in b/Modules/CMakeFortranCompilerId.F.in
index da3d9533d330900d256ef954fe221b4a0a3643d9..59956944beeb600c9cfb9a4b3feb3b10bdc90db1 100644
--- a/Modules/CMakeFortranCompilerId.F.in
+++ b/Modules/CMakeFortranCompilerId.F.in
@@ -105,8 +105,6 @@
 #       endif
 #elif defined(_AIX) || defined(__AIX) || defined(__AIX__) || defined(__aix) || defined(__aix__)
         PRINT *, 'INFO:compiler[VisualAge]'
-#elif defined(__sgi) || defined(__sgi__) || defined(_SGI)
-        PRINT *, 'INFO:compiler[MIPSpro]'
 #elif defined(__hpux) || defined(__hpux__)
         PRINT *, 'INFO:compiler[HP]'
 #elif defined(NAGFOR)
@@ -114,11 +112,7 @@
 #define COMPILER_VERSION_MAJOR DEC(__NAG_COMPILER_RELEASE/10)
 #define COMPILER_VERSION_MINOR DEC(__NAG_COMPILER_RELEASE % 10)
 #define COMPILER_VERSION_PATCH DEC(__NAG_COMPILER_BUILD)
-#elif 1
-#       if 0
-!       The above 'elif 1' instead of 'else' is to work around a bug in the
-!       SGI preprocessor which produces both the __sgi and else blocks.
-#       endif
+#else
         PRINT *, 'INFO:compiler[]'
 #endif
 #if defined(__CRAYXE) || defined(__CRAYXC)
@@ -148,8 +142,6 @@
         PRINT *, 'INFO:platform[SunOS]'
 #elif defined(_AIX) || defined(__AIX) || defined(__AIX__) || defined(__aix) || defined(__aix__)
         PRINT *, 'INFO:platform[AIX]'
-#elif defined(__sgi) || defined(__sgi__) || defined(_SGI)
-        PRINT *, 'INFO:platform[IRIX]'
 #elif defined(__hpux) || defined(__hpux__)
         PRINT *, 'INFO:platform[HP-UX]'
 #elif defined(__HAIKU__)
@@ -178,11 +170,7 @@
         PRINT *, 'INFO:platform[ULTRIX]'
 #elif defined(__XENIX__) || defined(_XENIX) || defined(XENIX)
         PRINT *, 'INFO:platform[Xenix]'
-#elif 1
-#       if 0
-!       The above 'elif 1' instead of 'else' is to work around a bug in the
-!       SGI preprocessor which produces both the __sgi and else blocks.
-#       endif
+#else
         PRINT *, 'INFO:platform[]'
 #endif
 #if defined(_WIN32) && (defined(__INTEL_COMPILER) || defined(__ICC))
diff --git a/Modules/CMakePlatformId.h.in b/Modules/CMakePlatformId.h.in
index dd77379c37d8d8800a01f6ced059bcc9835e9330..c2b5aa9291db8d13b94617ccbf1e34f8aa60f879 100644
--- a/Modules/CMakePlatformId.h.in
+++ b/Modules/CMakePlatformId.h.in
@@ -32,9 +32,6 @@
 #elif defined(_AIX) || defined(__AIX) || defined(__AIX__) || defined(__aix) || defined(__aix__)
 # define PLATFORM_ID "AIX"
 
-#elif defined(__sgi) || defined(__sgi__) || defined(_SGI)
-# define PLATFORM_ID "IRIX"
-
 #elif defined(__hpux) || defined(__hpux__)
 # define PLATFORM_ID "HP-UX"
 
diff --git a/Modules/Platform/IRIX.cmake b/Modules/Platform/IRIX.cmake
deleted file mode 100644
index 12b0f3774dfd3833075390bdd5dd1f3957421bed..0000000000000000000000000000000000000000
--- a/Modules/Platform/IRIX.cmake
+++ /dev/null
@@ -1,53 +0,0 @@
-set(CMAKE_DL_LIBS "")
-set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-shared -rdata_shared")
-set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG "-Wl,-rpath,")       # -rpath
-set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP "")   # : or empty
-if(NOT CMAKE_COMPILER_IS_GNUCXX)
-  set(CMAKE_CXX_CREATE_STATIC_LIBRARY
-      "<CMAKE_CXX_COMPILER> -ar -o <TARGET> <OBJECTS>")
-  set (CMAKE_CXX_FLAGS_INIT "")
-  set (CMAKE_CXX_FLAGS_DEBUG_INIT "-g")
-  set (CMAKE_CXX_FLAGS_MINSIZEREL_INIT "-O3 -DNDEBUG")
-  set (CMAKE_CXX_FLAGS_RELEASE_INIT "-O2 -DNDEBUG")
-  set (CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT "-O2")
-  set (CMAKE_C_FLAGS_INIT "")
-endif()
-# set flags for gcc support
-include(Platform/UnixPaths)
-
-if(NOT CMAKE_COMPILER_IS_GNUCC)
-  set (CMAKE_C_CREATE_PREPROCESSED_SOURCE "<CMAKE_C_COMPILER> <FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
-  set (CMAKE_C_CREATE_ASSEMBLY_SOURCE
-    "<CMAKE_C_COMPILER> <FLAGS> -S <SOURCE>"
-    "mv `basename \"<SOURCE>\" | sed 's/\\.[^./]*$$//'`.s <ASSEMBLY_SOURCE>"
-    )
-endif()
-
-if(NOT CMAKE_COMPILER_IS_GNUCXX)
-  set (CMAKE_CXX_CREATE_PREPROCESSED_SOURCE "<CMAKE_CXX_COMPILER> <FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
-  set (CMAKE_CXX_CREATE_ASSEMBLY_SOURCE
-    "<CMAKE_CXX_COMPILER> <FLAGS> -S <SOURCE>"
-    "mv `basename \"<SOURCE>\" | sed 's/\\.[^./]*$$//'`.s <ASSEMBLY_SOURCE>"
-    )
-endif()
-
-if(NOT CMAKE_COMPILER_IS_GNUG77)
-  set (CMAKE_Fortran_CREATE_PREPROCESSED_SOURCE "<CMAKE_Fortran_COMPILER> <FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
-  set (CMAKE_Fortran_CREATE_ASSEMBLY_SOURCE
-    "<CMAKE_Fortran_COMPILER> <FLAGS> -S <SOURCE>"
-    "mv `basename \"<SOURCE>\" | sed 's/\\.[^./]*$$//'`.s <ASSEMBLY_SOURCE>"
-    )
-endif()
-
-# Initialize C link type selection flags.  These flags are used when
-# building a shared library, shared module, or executable that links
-# to other libraries to select whether to use the static or shared
-# versions of the libraries.
-foreach(type SHARED_LIBRARY SHARED_MODULE EXE)
-  set(CMAKE_${type}_LINK_STATIC_C_FLAGS "-Wl,-Bstatic")
-  set(CMAKE_${type}_LINK_DYNAMIC_C_FLAGS "-Wl,-Bdynamic")
-endforeach()
-
-# The IRIX linker needs to find transitive shared library dependencies
-# in the -L path.
-set(CMAKE_LINK_DEPENDENT_LIBRARY_DIRS 1)
diff --git a/Modules/Platform/IRIX64.cmake b/Modules/Platform/IRIX64.cmake
deleted file mode 100644
index ee9b96e8954a517143819323ac3b8b48208330d0..0000000000000000000000000000000000000000
--- a/Modules/Platform/IRIX64.cmake
+++ /dev/null
@@ -1,73 +0,0 @@
-set(CMAKE_DL_LIBS "")
-set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-shared -rdata_shared")
-set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG "-Wl,-rpath,")       # -rpath
-set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP "")   # : or empty
-set(CMAKE_SHARED_LIBRARY_SONAME_C_FLAG "-Wl,-soname,")
-if(NOT CMAKE_COMPILER_IS_GNUCC)
-  # Set default flags init.
-  set(CMAKE_C_FLAGS_INIT "")
-  set(CMAKE_CXX_FLAGS_INIT "")
-  set(CMAKE_Fortran_FLAGS_INIT "")
-  set(CMAKE_EXE_LINKER_FLAGS_INIT "")
-  set(CMAKE_SHARED_LINKER_FLAGS_INIT "")
-  set(CMAKE_MODULE_LINKER_FLAGS_INIT "")
-
-  # If no -o32, -n32, or -64 flag is given, set a reasonable default.
-  if("$ENV{CFLAGS} $ENV{CXXFLAGS} $ENV{LDFLAGS}" MATCHES "-([no]32|64)")
-  else()
-    # Check if this is a 64-bit CMake.
-    if(CMAKE_FILE_SELF MATCHES "^CMAKE_FILE_SELF$")
-      exec_program(file ARGS ${CMAKE_COMMAND} OUTPUT_VARIABLE CMAKE_FILE_SELF)
-      set(CMAKE_FILE_SELF "${CMAKE_FILE_SELF}" CACHE INTERNAL
-        "Output of file command on ${CMAKE_COMMAND}.")
-    endif()
-
-    # Set initial flags to match cmake executable.
-    if(CMAKE_FILE_SELF MATCHES " 64-bit ")
-      set(CMAKE_C_FLAGS_INIT "-64")
-      set(CMAKE_CXX_FLAGS_INIT "-64")
-      set(CMAKE_Fortran_FLAGS_INIT "-64")
-      set(CMAKE_EXE_LINKER_FLAGS_INIT "-64")
-      set(CMAKE_SHARED_LINKER_FLAGS_INIT "-64")
-      set(CMAKE_MODULE_LINKER_FLAGS_INIT "-64")
-    endif()
-  endif()
-
-  # Set remaining defaults.
-  set(CMAKE_CXX_CREATE_STATIC_LIBRARY
-      "<CMAKE_CXX_COMPILER> -ar -o <TARGET> <OBJECTS>")
-  set (CMAKE_CXX_FLAGS_DEBUG_INIT "-g")
-  set (CMAKE_CXX_FLAGS_MINSIZEREL_INIT "-O3 -DNDEBUG")
-  set (CMAKE_CXX_FLAGS_RELEASE_INIT "-O2 -DNDEBUG")
-  set (CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT "-O2")
-endif()
-include(Platform/UnixPaths)
-
-if(NOT CMAKE_COMPILER_IS_GNUCC)
-  set (CMAKE_C_CREATE_PREPROCESSED_SOURCE "<CMAKE_C_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
-  set (CMAKE_C_CREATE_ASSEMBLY_SOURCE
-    "<CMAKE_C_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -S <SOURCE>"
-    "mv `basename \"<SOURCE>\" | sed 's/\\.[^./]*$$//'`.s <ASSEMBLY_SOURCE>"
-    )
-endif()
-
-if(NOT CMAKE_COMPILER_IS_GNUCXX)
-  set (CMAKE_CXX_CREATE_PREPROCESSED_SOURCE "<CMAKE_CXX_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
-  set (CMAKE_CXX_CREATE_ASSEMBLY_SOURCE
-    "<CMAKE_CXX_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -S <SOURCE>"
-    "mv `basename \"<SOURCE>\" | sed 's/\\.[^./]*$$//'`.s <ASSEMBLY_SOURCE>"
-    )
-endif()
-
-# Initialize C link type selection flags.  These flags are used when
-# building a shared library, shared module, or executable that links
-# to other libraries to select whether to use the static or shared
-# versions of the libraries.
-foreach(type SHARED_LIBRARY SHARED_MODULE EXE)
-  set(CMAKE_${type}_LINK_STATIC_C_FLAGS "-Wl,-Bstatic")
-  set(CMAKE_${type}_LINK_DYNAMIC_C_FLAGS "-Wl,-Bdynamic")
-endforeach()
-
-# The IRIX linker needs to find transitive shared library dependencies
-# in the -L path.
-set(CMAKE_LINK_DEPENDENT_LIBRARY_DIRS 1)
diff --git a/Modules/ProcessorCount.cmake b/Modules/ProcessorCount.cmake
index 05f56d8d0a8706721dc92c4606336d7362f426db..e4b4e53725df66136ab083628a737759e39a2345 100644
--- a/Modules/ProcessorCount.cmake
+++ b/Modules/ProcessorCount.cmake
@@ -12,7 +12,7 @@ Determine the number of processors/cores and save value in ${var}
 Sets the variable named ${var} to the number of physical cores
 available on the machine if the information can be determined.
 Otherwise it is set to 0.  Currently this functionality is implemented
-for AIX, cygwin, FreeBSD, HPUX, IRIX, Linux, macOS, QNX, Sun and
+for AIX, cygwin, FreeBSD, HPUX, Linux, macOS, QNX, Sun and
 Windows.
 
 This function is guaranteed to return a positive integer (>=1) if it
@@ -114,22 +114,6 @@ function(ProcessorCount var)
     endif()
   endif()
 
-  if(NOT count)
-    # IRIX (systems with hinv):
-    find_program(ProcessorCount_cmd_hinv hinv
-      PATHS /sbin)
-    mark_as_advanced(ProcessorCount_cmd_hinv)
-    if(ProcessorCount_cmd_hinv)
-      execute_process(COMMAND ${ProcessorCount_cmd_hinv}
-        ERROR_QUIET
-        OUTPUT_STRIP_TRAILING_WHITESPACE
-        OUTPUT_VARIABLE hinv_output)
-      string(REGEX MATCHALL "([0-9]+) .* Processors" procs "${hinv_output}")
-      set(count "${CMAKE_MATCH_1}")
-      #message("ProcessorCount: trying hinv '${ProcessorCount_cmd_hinv}'")
-    endif()
-  endif()
-
   if(NOT count)
     # AIX (systems with lsconf):
     find_program(ProcessorCount_cmd_lsconf lsconf
diff --git a/Source/cmComputeLinkInformation.cxx b/Source/cmComputeLinkInformation.cxx
index 27b8599f9ad8fcbe3e99eaf5f59a617789b046a4..29483f98f8e8ee9945b6e097e9461ac4c5fe9b37 100644
--- a/Source/cmComputeLinkInformation.cxx
+++ b/Source/cmComputeLinkInformation.cxx
@@ -30,7 +30,7 @@ Notes about linking on various platforms:
 
 ------------------------------------------------------------------------------
 
-Linux, FreeBSD, macOS, IRIX, Sun, Windows:
+Linux, FreeBSD, macOS, Sun, Windows:
 
 Linking to libraries using the full path works fine.
 
diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
index 803e5f0c0df11b4ec2d44127885be726b16b2560..6b166d64b8217a75afa52c6914d967e524ba3ae8 100644
--- a/Tests/CMakeLists.txt
+++ b/Tests/CMakeLists.txt
@@ -597,7 +597,6 @@ if(BUILD_TESTING)
   else()
     if (CMAKE_CXX_COMPILER_ID MATCHES "PGI"
         OR CMAKE_CXX_COMPILER_ID MATCHES "PathScale"
-        OR CMAKE_SYSTEM_NAME MATCHES "IRIX64"
         OR CMAKE_CXX_COMPILER_ID MATCHES "Intel")
       set(run_pic_test 0)
     else()
diff --git a/Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in b/Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in
index 9157c760b48ada696d0ed2e8feeee70b6076f265..f01e616f0102ed2df7643686c3af89a092b29eab 100644
--- a/Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in
+++ b/Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in
@@ -414,78 +414,6 @@ set(hp_f90_64_libs "-l:libF90.a;-l:libIO77.a;m;c;unwind;uca")
 set(hp_f90_64_dirs "/usr/lib/hpux64;/opt/langtools/lib/hpux64")
 list(APPEND platforms hp_f90_64)
 
-#-----------------------------------------------------------------------------
-# IRIX
-
-# cc -o32 dummy.c -v
-set(irix64_cc_o32_text "/usr/lib/ld -elf -_SYSTYPE_SVR4 -require_dynamic_link _rld_new_interface -no_unresolved -Wx,-G 0 -o32 -mips2 -call_shared -g0 -KPIC -L/usr/lib/ -nocount /usr/lib/crt1.o -count dummy.o -nocount -lc /usr/lib/crtn.o")
-set(irix64_cc_o32_libs "c")
-set(irix64_cc_o32_dirs "/usr/lib")
-list(APPEND platforms irix64_cc_o32)
-
-# cc -n32 dummy.c -v
-set(irix64_cc_n32_text "/usr/lib32/cmplrs/ld32 -call_shared -no_unresolved -transitive_link -elf -_SYSTYPE_SVR4 -show -mips4 -n32 -L/usr/lib32/mips4/r10000 -L/usr/lib32/mips4 -L/usr/lib32 /usr/lib32/mips4/crt1.o dummy.o -dont_warn_unused -Bdynamic -lc /usr/lib32/mips4/crtn.o -warn_unused")
-set(irix64_cc_n32_libs "c")
-set(irix64_cc_n32_dirs "/usr/lib32/mips4/r10000;/usr/lib32/mips4;/usr/lib32")
-list(APPEND platforms irix64_cc_n32)
-
-# cc -64 dummy.c -v
-set(irix64_cc_64_text "/usr/lib32/cmplrs/ld64 -call_shared -no_unresolved -transitive_link -elf -_SYSTYPE_SVR4 -show -mips4 -64 -L/usr/lib64/mips4/r10000 -L/usr/lib64/mips4 -L/usr/lib64 /usr/lib64/mips4/crt1.o dummy.o -dont_warn_unused -Bdynamic -lc /usr/lib64/mips4/crtn.o -warn_unused")
-set(irix64_cc_64_libs "c")
-set(irix64_cc_64_dirs "/usr/lib64/mips4/r10000;/usr/lib64/mips4;/usr/lib64")
-list(APPEND platforms irix64_cc_64)
-
-# CC -o32 dummy.cxx -v
-set(irix64_CC_o32_text "/usr/lib/ld -elf -cxx -woff 134 -_SYSTYPE_SVR4 -require_dynamic_link _rld_new_interface -no_unresolved -Wx,-G 0 -o32 -mips2 -call_shared -g0 -KPIC -L/usr/lib/ -nocount /usr/lib/crt1.o /usr/lib/c++init.o -count dummy.o -nocount -dont_warn_unused -lC -warn_unused -lc /usr/lib/crtn.o")
-set(irix64_CC_o32_libs "C;c")
-set(irix64_CC_o32_dirs "/usr/lib")
-list(APPEND platforms irix64_CC_o32)
-
-# CC -n32 dummy.cxx -v
-set(irix64_CC_n32_text "/usr/lib32/cmplrs/ld32 -call_shared -init _main -fini _fini -no_unresolved -transitive_link -demangle -elf -_SYSTYPE_SVR4 -LANG:std -show -mips4 -n32 -L/usr/lib32/mips4/r10000 -L/usr/lib32/mips4 -L/usr/lib32 -cxx -woff 134 /usr/lib32/mips4/crt1.o /usr/lib32/c++init.o dummy.o -dont_warn_unused -lCsup -lC -lCio -Bdynamic -lc /usr/lib32/mips4/crtn.o -warn_unused")
-set(irix64_CC_n32_libs "Csup;C;Cio;c")
-set(irix64_CC_n32_dirs "/usr/lib32/mips4/r10000;/usr/lib32/mips4;/usr/lib32")
-list(APPEND platforms irix64_CC_n32)
-
-# CC -64 dummy.cxx -v
-set(irix64_CC_64_text "/usr/lib32/cmplrs/ld64 -call_shared -init _main -fini _fini -no_unresolved -transitive_link -demangle -elf -_SYSTYPE_SVR4 -LANG:std -show -mips4 -64 -L/usr/lib64/mips4/r10000 -L/usr/lib64/mips4 -L/usr/lib64 -cxx -woff 134 /usr/lib64/mips4/crt1.o /usr/lib64/c++init.o dummy.o -dont_warn_unused -lCsup -lC -lCio -Bdynamic -lc /usr/lib64/mips4/crtn.o -warn_unused")
-set(irix64_CC_64_libs "Csup;C;Cio;c")
-set(irix64_CC_64_dirs "/usr/lib64/mips4/r10000;/usr/lib64/mips4;/usr/lib64")
-list(APPEND platforms irix64_CC_64)
-
-# f77 -o32 dummy.f -v
-set(irix64_f77_o32_text "/usr/lib/ld -elf -_SYSTYPE_SVR4 -require_dynamic_link _rld_new_interface -no_unresolved -Wx,-G 0 -o32 -mips2 -call_shared -g0 -KPIC -L/usr/lib/ -nocount /usr/lib/crt1.o -count dummy.o -nocount -lftn -lm -lc /usr/lib/crtn.o")
-set(irix64_f77_o32_libs "ftn;m;c")
-set(irix64_f77_o32_dirs "/usr/lib")
-list(APPEND platforms irix64_f77_o32)
-
-# f77 -n32 dummy.f -v
-set(irix64_f77_n32_text "/usr/lib32/cmplrs/ld32 -call_shared -no_unresolved -transitive_link -elf -_SYSTYPE_SVR4 -show -mips4 -n32 -L/usr/lib32/mips4/r10000 -L/usr/lib32/mips4 -L/usr/lib32 /usr/lib32/mips4/crt1.o dummy.o -dont_warn_unused -lftn -lm -Bdynamic -lc /usr/lib32/mips4/crtn.o -warn_unused")
-set(irix64_f77_n32_libs "ftn;m;c")
-set(irix64_f77_n32_dirs "/usr/lib32/mips4/r10000;/usr/lib32/mips4;/usr/lib32")
-list(APPEND platforms irix64_f77_n32)
-
-# f77 -64 dummy.f -v
-set(irix64_f77_64_text "/usr/lib32/cmplrs/ld64 -call_shared -no_unresolved -transitive_link -elf -_SYSTYPE_SVR4 -show -mips4 -64 -L/usr/lib64/mips4/r10000 -L/usr/lib64/mips4 -L/usr/lib64 /usr/lib64/mips4/crt1.o dummy.o -dont_warn_unused -lftn -lm -Bdynamic -lc /usr/lib64/mips4/crtn.o -warn_unused")
-set(irix64_f77_64_libs "ftn;m;c")
-set(irix64_f77_64_dirs "/usr/lib64/mips4/r10000;/usr/lib64/mips4;/usr/lib64")
-list(APPEND platforms irix64_f77_64)
-
-# f90 -o32 dummy.f -v
-#f90 ERROR:  specified abi -o32 not supported.
-
-# f90 -n32 dummy.f -v
-set(irix64_f90_n32_text "/usr/lib32/cmplrs/ld32 -call_shared -no_unresolved -transitive_link -elf -_SYSTYPE_SVR4 -show -mips4 -n32 -L/usr/lib32/mips4/r10000 -L/usr/lib32/mips4 -L/usr/lib32 /usr/lib32/mips4/crt1.o dummy.o -dont_warn_unused -lfortran -lffio -lftn -lm -Bdynamic -lc /usr/lib32/mips4/crtn.o -warn_unused")
-set(irix64_f90_n32_libs "fortran;ffio;ftn;m;c")
-set(irix64_f90_n32_dirs "/usr/lib32/mips4/r10000;/usr/lib32/mips4;/usr/lib32")
-list(APPEND platforms irix64_f90_n32)
-
-# f90 -64 dummy.f -v
-set(irix64_f90_64_text "/usr/lib32/cmplrs/ld64 -call_shared -no_unresolved -transitive_link -elf -_SYSTYPE_SVR4 -show -mips4 -64 -L/usr/lib64/mips4/r10000 -L/usr/lib64/mips4 -L/usr/lib64 /usr/lib64/mips4/crt1.o dummy.o -dont_warn_unused -lfortran -lffio -lftn -lm -Bdynamic -lc /usr/lib64/mips4/crtn.o -warn_unused")
-set(irix64_f90_64_libs "fortran;ffio;ftn;m;c")
-set(irix64_f90_64_dirs "/usr/lib64/mips4/r10000;/usr/lib64/mips4;/usr/lib64")
-list(APPEND platforms irix64_f90_64)
-
 #-----------------------------------------------------------------------------
 # Cygwin
 
diff --git a/Tests/ExportImport/Import/A/CMakeLists.txt b/Tests/ExportImport/Import/A/CMakeLists.txt
index 67fcc02921407a075694138a4b4ced61cb97935c..811fff340e7c265ae9350b79ddd3c2bc2cace444 100644
--- a/Tests/ExportImport/Import/A/CMakeLists.txt
+++ b/Tests/ExportImport/Import/A/CMakeLists.txt
@@ -332,7 +332,6 @@ if (APPLE OR CMAKE_CXX_COMPILER_ID MATCHES "GNU")
 else()
   if (CMAKE_CXX_COMPILER_ID MATCHES "PGI"
       OR CMAKE_CXX_COMPILER_ID MATCHES "PathScale"
-      OR CMAKE_SYSTEM_NAME MATCHES "IRIX64"
       OR CMAKE_CXX_COMPILER_ID MATCHES "Intel")
     set(run_pic_test 0)
   else()
diff --git a/Tests/SubDirSpaces/CMakeLists.txt b/Tests/SubDirSpaces/CMakeLists.txt
index 40c265e5f951de81bcceaa7a6c9712c560a906b6..0d45db85c5c8aa16a4a26405013aa79c4007274b 100644
--- a/Tests/SubDirSpaces/CMakeLists.txt
+++ b/Tests/SubDirSpaces/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required (VERSION 2.6)
 project(SUBDIR)
 
 # Some systems do not seem to support rpath with spaces.
-if(CMAKE_SYSTEM_NAME MATCHES "IRIX|QNX")
+if(CMAKE_SYSTEM_NAME MATCHES "QNX")
   set(CMAKE_SKIP_BUILD_RPATH 1)
 endif()