d003e0d7fe
This contains many small bugfixes and documentation improvements. Sponsored by: The FreeBSD Foundation
52 lines
1.3 KiB
Bash
Executable File
52 lines
1.3 KiB
Bash
Executable File
#!/bin/sh
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#
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# $Id: native-elf-format 3735 2019-04-25 19:44:47Z jkoshy $
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#
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# Find the native ELF format for a host platform by compiling a
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# test object and examining the resulting object.
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#
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# This script is used if there is no easy way to determine this
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# information statically at compile time.
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program=`basename $0`
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tmp_c=`mktemp -u nefXXXXXX`.c
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tmp_o=`echo ${tmp_c} | sed -e 's/.c$/.o/'`
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trap "rm -f ${tmp_c} ${tmp_o}" 0 1 2 3 15
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touch ${tmp_c}
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echo "/* Generated by ${program} on `date` */"
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cc -c ${tmp_c} -o ${tmp_o}
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LC_ALL=C readelf -h ${tmp_o} | awk '
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$1 ~ "Class:" {
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sub("ELF","",$2); elfclass = $2;
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}
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$1 ~ "Data:" {
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if (match($0, "little")) {
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elfdata = "LSB";
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} else {
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elfdata = "MSB";
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}
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}
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$1 ~ "Machine:" {
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if (match($0, "Intel.*386")) {
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elfarch = "EM_386";
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} else if (match($0, "MIPS")) {
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elfarch = "EM_MIPS";
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} else if (match($0, ".*[xX]86[-_]64")) {
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elfarch = "EM_X86_64";
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} else if (match($0, "PowerPC64")) {
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elfarch = "EM_PPC64";
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} else {
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elfarch = "unknown";
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}
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}
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END {
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printf("#define ELFTC_CLASS ELFCLASS%s\n", elfclass);
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printf("#define ELFTC_ARCH %s\n", elfarch);
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printf("#define ELFTC_BYTEORDER ELFDATA2%s\n", elfdata);
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}'
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