diff options
author | Siddhesh Poyarekar <siddhesh@redhat.com> | 2014-12-29 17:37:54 +0530 |
---|---|---|
committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2014-12-29 17:37:54 +0530 |
commit | 4a6aca7bf8a70f1dc66a07c04aba2d7fd837602d (patch) | |
tree | 6f85eb5f9cba191e17cfb74c83d12c19b44a6a7a /scripts/gen-posix-conf-vars.awk | |
parent | 0025b4cc84a0c1099b11a662acabce2709121be5 (diff) | |
download | glibc-4a6aca7bf8a70f1dc66a07c04aba2d7fd837602d.zip glibc-4a6aca7bf8a70f1dc66a07c04aba2d7fd837602d.tar.gz glibc-4a6aca7bf8a70f1dc66a07c04aba2d7fd837602d.tar.bz2 |
Remove Wundef warnings for specification macros
This patch adds a file posix-conf-vars.list that is used to generate
macros to determine if a macro is defined as set, unset or not
defined. gen-posix-conf-vars.awk processes this file and generates a
header (posix-conf-vars-def.h) with these macros. A new header
posix-conf-vars.h includes this generated header and defines accessor
macros for the generated macros.
Tested on x86_64.
* posix/Makefile (before-compile): Add posix-conf-vars-def.h.
($(objpfx)posix-conf-vars-def.h): New target.
* posix/posix-conf-vars.list: New file.
* posix/posix-conf-vars.h: New file.
* posix/confstr.c: Include posix-conf-vars.h.
(confstr): Use CONF_IS_* macros.
* posix/posix-envs.def: Include posix-conf-vars.h. Use
CONF_IS_* macros.
* scripts/gen-posix-conf-vars.awk: New file.
Diffstat (limited to 'scripts/gen-posix-conf-vars.awk')
-rw-r--r-- | scripts/gen-posix-conf-vars.awk | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/scripts/gen-posix-conf-vars.awk b/scripts/gen-posix-conf-vars.awk new file mode 100644 index 0000000..16e20fc --- /dev/null +++ b/scripts/gen-posix-conf-vars.awk @@ -0,0 +1,61 @@ +# Generate posix-conf-vars-def.h with definitions for CONF_DEF{CONF} for each +# configuration variable that getconf or sysconf may use. Currently it is +# equipped only to generate such macros for specification macros and for +# SYSCONF macros in the _POSIX namespace. + +BEGIN { + prefix = "" +} + +$1 ~ /^#/ || $0 ~ /^\s*$/ { + next +} + +# Begin a new prefix. +$NF == "{" { + type = $1 + prefix = $2 + next +} + +$1 == "}" { + prefix = "" + type = "" + next +} + +{ + if (prefix == "" && type == "" && sc_prefix == "") { + printf ("Syntax error at %s:%d\n", FILENAME, FNR) > "/dev/stderr" + exit 1 + } + + # The prefix and variable names are indices and the value indicates what type + # of variable it is. The possible options are: + # CONFSTR: A configuration string + # SYSCONF: A numeric value + # SPEC: A specification + conf[prefix][$1] = type +} + +END { + print "/* AUTOGENERATED by gen-posix-conf-vars.awk. DO NOT EDIT. */\n" + + # Generate macros that specify if a sysconf macro is defined and/or set. + for (p in conf) { + for (c in conf[p]) { + printf "#ifndef _%s_%s\n", p, c + printf "# define CONF_DEF_%s_%s CONF_DEF_UNDEFINED\n", p, c + # CONFSTR have string values and they are not set or unset. + if (conf[p][c] != "CONFSTR") { + printf "#else\n" + printf "# if _%s_%s > 0\n", p, c + printf "# define CONF_DEF_%s_%s CONF_DEF_DEFINED_SET\n", p, c + printf "# else\n" + printf "# define CONF_DEF_%s_%s CONF_DEF_DEFINED_UNSET\n", p, c + printf "# endif\n" + } + printf "#endif\n\n" + } + } +} |