Added scanner.re

Author: sergeyklay

.gitignore

@@ -6,3 +6,4 @@
 # https://help.github.com/articles/ignoring-files/#create-a-global-gitignore
 
 parser/lemon
+parser/scanner.c

README.md

@@ -12,7 +12,7 @@ On a Unix-based platform you can easily compile and install the extension from s
 
 Prerequisite packages are:
 
-* GCC compiler (Linux/Solaris/FreeBSD) or Xcode (MacOS)
+* GCC/Clang compiler (Linux/Solaris/FreeBSD) or Xcode (MacOS)
 * [`re2c`](http://re2c.org/) >= 0.13
 
 ## License

parser/build-linux

@@ -1,8 +1,11 @@
 #!/usr/bin/env bash
 
 CC=${CC:-}
-GCC_BIN=${GCC_BIN:-$(which gcc 2>/dev/null)}
-CLANG_BIN=${CLANG_BIN:-$(which clang 2>/dev/null)}
+
+GCC_BIN=${GCC_BIN:-$(command -v gcc 2>/dev/null)}
+CLANG_BIN=${CLANG_BIN:-$(command -v clang 2>/dev/null)}
+
+RE2C_BIN=${RE2C_BIN:-$(command -v re2c 2>/dev/null)}
 
 if [ x"$CC" != x ]; then
     if [ x"$GCC_BIN" != x ]; then
@@ -15,10 +18,17 @@ if [ x"$CC" != x ]; then
 fi
 
 if [ x"$CC" = x ]; then
-    echo -e "Unable to locate the compiler"
+    echo -e "error: unable to locate the compiler"
     exit 1
 fi
 
+if [ x"$RE2C_BIN" = x ]; then
+  echo -e "error: unable to locate the re2c"
+  exit 2
+fi
+
+${RE2C_BIN} -o scanner.c scanner.re
+
 rm -f *.o *.lo
 
 # Compile lemon