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Remove large file macros

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Large file offsets aren't being utilized, and C++ seems to use to 64-bit
offsets anyway.
This commit is contained in:
Chris Robinson
2019-09-22 11:17:31 -07:00
parent 5f6a35c960
commit 9c95f62e95
3 changed files with 0 additions and 61 deletions
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CMakeLists.txt
-13
View File
@@ -46,7 +46,6 @@ INCLUDE(CheckCSourceCompiles)
INCLUDE(CheckCXXSourceCompiles)
INCLUDE(CheckTypeSize)
include(CheckStructHasMember)
include(CheckFileOffsetBits)
include(GNUInstallDirs)
@@ -150,18 +149,6 @@ if(NOT WIN32)
UNSET(OLD_REQUIRED_FLAGS)
ENDIF()
# Set defines for large file support. Don't set this for Android targets. See:
# https://android-developers.googleblog.com/2017/09/introducing-android-native-development.html
IF(NOT ANDROID)
CHECK_FILE_OFFSET_BITS()
IF(_FILE_OFFSET_BITS)
SET(CPP_DEFS ${CPP_DEFS} "_FILE_OFFSET_BITS=${_FILE_OFFSET_BITS}")
SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -D_FILE_OFFSET_BITS=${_FILE_OFFSET_BITS}")
ENDIF()
SET(CPP_DEFS ${CPP_DEFS} _LARGEFILE_SOURCE _LARGE_FILES)
SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -D_LARGEFILE_SOURCE -D_LARGE_FILES")
ENDIF()
# C99 has restrict, but C++ does not, so we can only utilize __restrict.
SET(RESTRICT_DECL )
CHECK_CXX_SOURCE_COMPILES("int *__restrict foo;
cmake/CheckFileOffsetBits.c
-9
View File
@@ -1,9 +0,0 @@
#include <sys/types.h>
#define KB ((off_t)(1024))
#define MB ((off_t)(KB*1024))
#define GB ((off_t)(MB*1024))
int tb[((GB+GB+GB) > GB) ? 1 : -1];
int main()
{ return 0; }
cmake/CheckFileOffsetBits.cmake
-39
View File
@@ -1,39 +0,0 @@
# - Check if the _FILE_OFFSET_BITS macro is needed for large files
# CHECK_FILE_OFFSET_BITS()
#
# The following variables may be set before calling this macro to
# modify the way the check is run:
#
# CMAKE_REQUIRED_FLAGS = string of compile command line flags
# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
# CMAKE_REQUIRED_INCLUDES = list of include directories
# Copyright (c) 2009, Chris Robinson
#
# Redistribution and use is allowed according to the terms of the LGPL license.
MACRO(CHECK_FILE_OFFSET_BITS)
IF(NOT DEFINED _FILE_OFFSET_BITS)
MESSAGE(STATUS "Checking _FILE_OFFSET_BITS for large files")
TRY_COMPILE(__WITHOUT_FILE_OFFSET_BITS_64
${CMAKE_CURRENT_BINARY_DIR}
${CMAKE_CURRENT_SOURCE_DIR}/cmake/CheckFileOffsetBits.c
COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS})
IF(NOT __WITHOUT_FILE_OFFSET_BITS_64)
TRY_COMPILE(__WITH_FILE_OFFSET_BITS_64
${CMAKE_CURRENT_BINARY_DIR}
${CMAKE_CURRENT_SOURCE_DIR}/cmake/CheckFileOffsetBits.c
COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} -D_FILE_OFFSET_BITS=64)
ENDIF(NOT __WITHOUT_FILE_OFFSET_BITS_64)
IF(NOT __WITHOUT_FILE_OFFSET_BITS_64 AND __WITH_FILE_OFFSET_BITS_64)
SET(_FILE_OFFSET_BITS 64 CACHE INTERNAL "_FILE_OFFSET_BITS macro needed for large files")
MESSAGE(STATUS "Checking _FILE_OFFSET_BITS for large files - 64")
ELSE(NOT __WITHOUT_FILE_OFFSET_BITS_64 AND __WITH_FILE_OFFSET_BITS_64)
SET(_FILE_OFFSET_BITS "" CACHE INTERNAL "_FILE_OFFSET_BITS macro needed for large files")
MESSAGE(STATUS "Checking _FILE_OFFSET_BITS for large files - not needed")
ENDIF(NOT __WITHOUT_FILE_OFFSET_BITS_64 AND __WITH_FILE_OFFSET_BITS_64)
ENDIF(NOT DEFINED _FILE_OFFSET_BITS)
ENDMACRO(CHECK_FILE_OFFSET_BITS)