50cbbaa935
This patch adds support to generate the spec array in getconf from the conf.list. The generated code is mostly unchanged. the only changes are due to the change in layout of the spec and val arrays in the ELF. The val array can also be auto-generated from posix-conf-vars.list once the remaining macros are added to it. * posix/posix-conf-vars.list (SPEC:XBS5): Add sysconf prefix. * posix/confstr.c: Define NEED_SPEC_ARRAY to 0. * posix/posix-envs.def: Likewise. * sysdeps/posix/sysconf.c: Likewise. * posix/getconf.c: Define NEED_SPEC_ARRAY to 1. (specs): Remove array. * scripts/gen-posix-conf-vars.awk: Support generation of specs array.
90 lines
2.3 KiB
Awk
90 lines
2.3 KiB
Awk
# Generate posix-conf-vars-def.h with definitions for CONF_DEF{CONF} for each
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# configuration variable that getconf or sysconf may use. Currently it is
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# equipped only to generate such macros for specification macros and for
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# SYSCONF macros in the _POSIX namespace.
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BEGIN {
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prefix = ""
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}
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$1 ~ /^#/ || $0 ~ /^\s*$/ {
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next
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}
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# Begin a new prefix.
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$NF == "{" {
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type = $1
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prefix = $2
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if (NF == 4)
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sc_prefix = $3
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else
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sc_prefix = "_SC"
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next
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}
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$1 == "}" {
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prefix = ""
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type = ""
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sc_prefix = ""
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next
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}
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{
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if (prefix == "" && type == "" && sc_prefix == "") {
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printf ("Syntax error at %s:%d\n", FILENAME, FNR) > "/dev/stderr"
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exit 1
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}
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# The prefix and variable names are indices and the value indicates what type
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# of variable it is. The possible options are:
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# CONFSTR: A configuration string
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# SYSCONF: A numeric value
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# SPEC: A specification
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sc_prefixes[prefix][$1] = sc_prefix
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conf[prefix][$1] = type
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}
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END {
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print "/* AUTOGENERATED by gen-posix-conf-vars.awk. DO NOT EDIT. */\n"
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# Generate macros that specify if a sysconf macro is defined and/or set.
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for (p in conf) {
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for (c in conf[p]) {
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printf "#ifndef _%s_%s\n", p, c
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printf "# define CONF_DEF_%s_%s CONF_DEF_UNDEFINED\n", p, c
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# CONFSTR have string values and they are not set or unset.
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if (conf[p][c] != "CONFSTR") {
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printf "#else\n"
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printf "# if _%s_%s > 0\n", p, c
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printf "# define CONF_DEF_%s_%s CONF_DEF_DEFINED_SET\n", p, c
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printf "# else\n"
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printf "# define CONF_DEF_%s_%s CONF_DEF_DEFINED_UNSET\n", p, c
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printf "# endif\n"
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}
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printf "#endif\n\n"
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# Build a name -> sysconf number associative array to print a C array at
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# the end.
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if (conf[p][c] == "SPEC") {
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name = sprintf ("%s_%s", p, c)
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num = sprintf ("%s_%s", sc_prefixes[p][c], c)
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spec[name] = num
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}
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}
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}
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# Print the specification array. Define the macro NEED_SPEC_ARRAY before
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# including posix-conf-vars.h to make it available in the compilation unit.
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print "#if NEED_SPEC_ARRAY"
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print "static const struct { const char *name; int num; } specs[] ="
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print " {"
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for (s in spec) {
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printf " { \"%s\", %s },\n", s, spec[s]
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}
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print " };"
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print "static const int nspecs = sizeof (specs) / sizeof (specs[0]);"
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print "#endif"
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}
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