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#!/bin/sh
set -eu
# Use CC if specified in environment, else default to "cc".
: "${CC:=cc}"
# Use CFLAGS if specified in environment.
: "${CFLAGS:=}"
echo "/* THIS FILE WAS AUTOMATICALLY GENERATED. DO NOT EDIT. */"
echo "#ifndef CONFIG_H"
echo "#define CONFIG_H"
program_compiles() {
echo "$1" | $CC $CFLAGS -Wno-error -x c - -o /dev/null > /dev/null 2>&1
}
check_function() {
funcname=$1
macro="HAVE_$(echo "$funcname" | tr '[:lower:]' '[:upper:]')"
echo
echo "/* Is the $funcname() function available? */"
if program_compiles "int main() { $funcname(); }"; then
echo "#define $macro 1"
else
echo "/* $macro is not set */"
fi
}
have_stat_field() {
program_compiles "#include <sys/types.h>
#include <sys/stat.h>
int main() { struct stat st; st.$1; }"
}
check_stat_nanosecond_precision() {
echo
echo "/* Does stat() provide nanosecond-precision timestamps? */"
if have_stat_field st_atim; then
echo "#define HAVE_STAT_NANOSECOND_PRECISION 1"
elif have_stat_field st_atimespec; then
# Nonstandard field names used by OS X and older BSDs
echo "#define HAVE_STAT_NANOSECOND_PRECISION 1"
echo "#define st_atim st_atimespec"
echo "#define st_mtim st_mtimespec"
echo "#define st_ctim st_ctimespec"
else
echo "/* HAVE_STAT_NANOSECOND_PRECISION is not set */"
fi
}
check_function clock_gettime
check_function futimens
check_function futimes
check_function posix_fadvise
check_function posix_madvise
check_stat_nanosecond_precision
echo
echo "#endif /* CONFIG_H */"
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