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