updated compiler flags and runtime header

diff --git a/acc b/acc
index acdf06b3de0d7a1b7e8613cae3ab40aa307c462f..82be42ed78ef9367b557a0c5aa9c1cfc21c596e3 100755 (executable)
--- a/acc
+++ b/acc
@@ -1,15 +1,56 @@
 #!/usr/bin/env bash
+#
+# Copyright 2019 Michael D. Lowis
+#-------------------------------------------------------------------------------
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+# PERFORMANCE OF THIS SOFTWARE.
+
+# Wrapper script for system compiler that enables some flags by default and scans
+# for library dependencies.
+#
+# Compilation Features:
+#   * Enables --std=c99 -pedantic
+#   * Enables -Wall -Wextra -Werror
+#   * Defines AUTOLIB() macro to specify dependencies in sources and headers
+#   * Auto-includes commonly include headers such as stddef.h, stdio.h, etc.
+#
+# Linking Features:
+#   * Scans objects for AUTOLIB()-ed libs, and adds the -l flags for them
 
 # predeclare our variables
 declare -a objects
 declare -a libpaths
-declare -a libraries
 compile=false
 runtime='
 #define _POSIX_C_SOURCE 200809L
 #define _XOPEN_SOURCE 700
 #define AUTOLIB(n) \
-    int __autolib_##n __attribute__ ((weak));'
+    int __autolib_##n __attribute__ ((weak));
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <fcntl.h>
+' # end of runtime definition
 
 # scan the rest of the options for lib paths, libs and objects
 for i do
@@ -20,7 +61,7 @@ for i do
         -L*) # Add libpaths to the search list
             libpaths+=("${i#-L}") ;;
 
-        -c) # Mark this as compilation only
+        -c|-E) # Mark this as compilation/preprocess only
             compile=true ;;
     esac
 done
@@ -29,7 +70,7 @@ done
 if $compile; then
     genfile=$(mktemp)
     printf '%s\n' "$runtime" > "$genfile"
-    cc -include "$genfile" "$@"
+    cc -isystem "${genfile%/*}" -include "${genfile##*/}" --std=c99 -pedantic -Wall -Wextra -Werror "$@"
     status=$?
     rm "$genfile"
     exit "$status"
@@ -37,7 +78,7 @@ fi
 
 # scan objects/libs for referenced libraries
 scan_for_libs(){
-    nm "$@" | sed -n '/__autolib/ s/.*_\+autolib_// p' | sort -u
+    [[ $# -ne 0 ]] && nm "$@" | sed -n '/__autolib/ s/.*_\+autolib_// p' | sort -u
 }
 
 # if we made it here, we must be linking. scan for dependencies