From 2fbdf974338bde8576efdae40a819a76b2391033 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Sun, 5 Nov 2023 11:22:55 +0000
Subject: Initial import of the open source release

---
 .../src/libdivsufsort/CMakeModules/CheckLFS.cmake  | 109 +++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 tools/apultra_src/src/libdivsufsort/CMakeModules/CheckLFS.cmake

(limited to 'tools/apultra_src/src/libdivsufsort/CMakeModules/CheckLFS.cmake')

diff --git a/tools/apultra_src/src/libdivsufsort/CMakeModules/CheckLFS.cmake b/tools/apultra_src/src/libdivsufsort/CMakeModules/CheckLFS.cmake
new file mode 100644
index 0000000..e2b0099
--- /dev/null
+++ b/tools/apultra_src/src/libdivsufsort/CMakeModules/CheckLFS.cmake
@@ -0,0 +1,109 @@
+## Checks for large file support ##
+include(CheckIncludeFile)
+include(CheckSymbolExists)
+include(CheckTypeSize)
+
+macro(check_lfs _isenable)
+  set(LFS_OFF_T "")
+  set(LFS_FOPEN "")
+  set(LFS_FSEEK "")
+  set(LFS_FTELL "")
+  set(LFS_PRID "")
+
+  if(${_isenable})
+    set(SAFE_CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS}")
+    set(CMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
+        -D_LARGEFILE_SOURCE -D_LARGE_FILES -D_FILE_OFFSET_BITS=64
+        -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS)
+
+    check_include_file("sys/types.h" HAVE_SYS_TYPES_H)
+    check_include_file("inttypes.h" HAVE_INTTYPES_H)
+    check_include_file("stddef.h" HAVE_STDDEF_H)
+    check_include_file("stdint.h" HAVE_STDINT_H)
+
+    # LFS type1: 8 <= sizeof(off_t), fseeko, ftello
+    check_type_size("off_t" SIZEOF_OFF_T)
+    if(SIZEOF_OFF_T GREATER 7)
+      check_symbol_exists("fseeko" "stdio.h" HAVE_FSEEKO)
+      check_symbol_exists("ftello" "stdio.h" HAVE_FTELLO)
+      if(HAVE_FSEEKO AND HAVE_FTELLO)
+        set(LFS_OFF_T "off_t")
+        set(LFS_FOPEN "fopen")
+        set(LFS_FSEEK "fseeko")
+        set(LFS_FTELL "ftello")
+        check_symbol_exists("PRIdMAX" "inttypes.h" HAVE_PRIDMAX)
+        if(HAVE_PRIDMAX)
+          set(LFS_PRID "PRIdMAX")
+        else(HAVE_PRIDMAX)
+          check_type_size("long" SIZEOF_LONG)
+          check_type_size("int" SIZEOF_INT)
+          if(SIZEOF_OFF_T GREATER SIZEOF_LONG)
+            set(LFS_PRID "\"lld\"")
+          elseif(SIZEOF_LONG GREATER SIZEOF_INT)
+            set(LFS_PRID "\"ld\"")
+          else(SIZEOF_OFF_T GREATER SIZEOF_LONG)
+            set(LFS_PRID "\"d\"")
+          endif(SIZEOF_OFF_T GREATER SIZEOF_LONG)
+        endif(HAVE_PRIDMAX)
+      endif(HAVE_FSEEKO AND HAVE_FTELLO)
+    endif(SIZEOF_OFF_T GREATER 7)
+
+    # LFS type2: 8 <= sizeof(off64_t), fopen64, fseeko64, ftello64
+    if(NOT LFS_OFF_T)
+      check_type_size("off64_t" SIZEOF_OFF64_T)
+      if(SIZEOF_OFF64_T GREATER 7)
+        check_symbol_exists("fopen64" "stdio.h" HAVE_FOPEN64)
+        check_symbol_exists("fseeko64" "stdio.h" HAVE_FSEEKO64)
+        check_symbol_exists("ftello64" "stdio.h" HAVE_FTELLO64)
+        if(HAVE_FOPEN64 AND HAVE_FSEEKO64 AND HAVE_FTELLO64)
+          set(LFS_OFF_T "off64_t")
+          set(LFS_FOPEN "fopen64")
+          set(LFS_FSEEK "fseeko64")
+          set(LFS_FTELL "ftello64")
+          check_symbol_exists("PRIdMAX" "inttypes.h" HAVE_PRIDMAX)
+          if(HAVE_PRIDMAX)
+            set(LFS_PRID "PRIdMAX")
+          else(HAVE_PRIDMAX)
+            check_type_size("long" SIZEOF_LONG)
+            check_type_size("int" SIZEOF_INT)
+            if(SIZEOF_OFF64_T GREATER SIZEOF_LONG)
+              set(LFS_PRID "\"lld\"")
+            elseif(SIZEOF_LONG GREATER SIZEOF_INT)
+              set(LFS_PRID "\"ld\"")
+            else(SIZEOF_OFF64_T GREATER SIZEOF_LONG)
+              set(LFS_PRID "\"d\"")
+            endif(SIZEOF_OFF64_T GREATER SIZEOF_LONG)
+          endif(HAVE_PRIDMAX)
+        endif(HAVE_FOPEN64 AND HAVE_FSEEKO64 AND HAVE_FTELLO64)
+      endif(SIZEOF_OFF64_T GREATER 7)
+    endif(NOT LFS_OFF_T)
+
+    # LFS type3: 8 <= sizeof(__int64), _fseeki64, _ftelli64
+    if(NOT LFS_OFF_T)
+      check_type_size("__int64" SIZEOF___INT64)
+      if(SIZEOF___INT64 GREATER 7)
+        check_symbol_exists("_fseeki64" "stdio.h" HAVE__FSEEKI64)
+        check_symbol_exists("_ftelli64" "stdio.h" HAVE__FTELLI64)
+        if(HAVE__FSEEKI64 AND HAVE__FTELLI64)
+          set(LFS_OFF_T "__int64")
+          set(LFS_FOPEN "fopen")
+          set(LFS_FSEEK "_fseeki64")
+          set(LFS_FTELL "_ftelli64")
+          set(LFS_PRID  "\"I64d\"")
+        endif(HAVE__FSEEKI64 AND HAVE__FTELLI64)
+      endif(SIZEOF___INT64 GREATER 7)
+    endif(NOT LFS_OFF_T)
+
+    set(CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}")
+  endif(${_isenable})
+
+  if(NOT LFS_OFF_T)
+    ## not found
+    set(LFS_OFF_T "long")
+    set(LFS_FOPEN "fopen")
+    set(LFS_FSEEK "fseek")
+    set(LFS_FTELL "ftell")
+    set(LFS_PRID  "\"ld\"")
+  endif(NOT LFS_OFF_T)
+
+endmacro(check_lfs)
-- 
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