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# (C) Copyright 2011- ECMWF.
#
# This software is licensed under the terms of the Apache Licence Version 2.0
# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
# In applying this licence, ECMWF does not waive the privileges and immunities
# granted to it by virtue of its status as an intergovernmental organisation nor
# does it submit to any jurisdiction.
test_big_endian( _BIG_ENDIAN )
if( _BIG_ENDIAN )
set( ECCODES_BIG_ENDIAN 1 )
set( ECCODES_LITTLE_ENDIAN 0 )
else()
set( ECCODES_BIG_ENDIAN 0 )
set( ECCODES_LITTLE_ENDIAN 1 )
endif()
set( ECCODES_BIG_ENDIAN ${ECCODES_BIG_ENDIAN} )
set( ECCODES_LITTLE_ENDIAN ${ECCODES_LITTLE_ENDIAN} )
if( NOT DEFINED IEEE_BE )
check_c_source_runs(
"int compare(unsigned char* a,unsigned char* b) {
while(*a != 0) if (*(b++)!=*(a++)) return 1;
return 0;
}
int main(int argc,char** argv) {
unsigned char dc[]={0x30,0x61,0xDE,0x80,0x93,0x67,0xCC,0xD9,0};
double da=1.23456789e-75;
unsigned char* ca;
unsigned char fc[]={0x05,0x83,0x48,0x22,0};
float fa=1.23456789e-35;
if (sizeof(double)!=8) return 1;
ca=(unsigned char*)&da;
if (compare(dc,ca)) return 1;
if (sizeof(float)!=4) return 1;
ca=(unsigned char*)&fa;
if (compare(fc,ca)) return 1;
return 0;
}" IEEE_BE )
if( "${IEEE_BE}" STREQUAL "" )
set( IEEE_BE 0 CACHE INTERNAL "Test IEEE_BE")
endif()
endif()
if( ECCODES_BIG_ENDIAN AND NOT IEEE_BE )
ecbuild_critical("Failed to sanity check on endiness: OS should be Big-Endian but compiled code runs differently -- to ignore this pass -DIEEE_BE=1 to CMake/ecBuild")
endif()
if( NOT DEFINED IEEE_LE )
check_c_source_runs(
"int compare(unsigned char* a,unsigned char* b) {
while(*a != 0) if (*(b++)!=*(a++)) return 1;
return 0;
}
int main(int argc,char** argv) {
unsigned char dc[]={0xD9,0xCC,0x67,0x93,0x80,0xDE,0x61,0x30,0};
double da=1.23456789e-75;
unsigned char* ca;
unsigned char fc[]={0x22,0x48,0x83,0x05,0};
float fa=1.23456789e-35;
if (sizeof(double)!=8) return 1;
ca=(unsigned char*)&da;
if (compare(dc,ca)) return 1;
if (sizeof(float)!=4) return 1;
ca=(unsigned char*)&fa;
if (compare(fc,ca)) return 1;
return 0;
}" IEEE_LE )
if( "${IEEE_LE}" STREQUAL "" )
set( IEEE_LE 0 CACHE INTERNAL "Test IEEE_LE")
endif()
endif()
if( ECCODES_LITTLE_ENDIAN AND NOT IEEE_LE )
ecbuild_critical("Failed to sanity check on endiness: OS should be Little-Endian but compiled code runs differently -- to ignore this pass -DIEEE_LE=1 to CMake/ecBuild")
endif()
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