Revert behavior to either INSTALL_DIR or BUILD_DIR but not both. Also, if

using BUILD_DIR and uClibc dynamic linker, use the one in the build dir.
If people want the "both dir" behavior, I'll enable it similar to the
"build" and "rpath" behaviors.  See the comments in the file for how this
works.

extra/gcc-uClibc/gcc-uClibc.c

@@ -48,7 +48,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <sys/stat.h>
 
 #include "gcc-uClibc.h"
 
@@ -74,11 +73,11 @@ static char *crt0_path[] = {
 
 static char *lib_path[] = {
 	"-L"UCLIBC_INSTALL_DIR"lib",
-	"-L"UCLIBC_INSTALL_DIR"usr/lib",
 	"-L"UCLIBC_BUILD_DIR"lib"
-	"-L"UCLIBC_BUILD_DIR"usr/lib"
 };
 
+static char *usr_lib_path = "-L"UCLIBC_INSTALL_DIR"usr/lib";
+
 static char static_linking[] = "-static";
 static char nostdinc[] = "-nostdinc";
 static char nostartfiles[] = "-nostartfiles";
@@ -87,7 +86,7 @@ static char nostdlib[] = "-nostdlib";
 
 int main(int argc, char **argv)
 {
-	int linking = 1, use_static_linking = 0;
+	int use_build_dir = 0, linking = 1, use_static_linking = 0;
 	int use_stdinc = 1, use_start = 1, use_stdlib = 1;
 	int source_count = 0, use_rpath = 0, verbose = 0;
 	int i, j;
@@ -99,23 +98,14 @@ int main(int argc, char **argv)
 		ep = "";
 	}
 
+	if ((strstr(argv[0],"build") != 0) || (strstr(ep,"build") != 0)) {
+		use_build_dir = 1;
+	}
+
 	if ((strstr(argv[0],"rpath") != 0) || (strstr(ep,"rpath") != 0)) {
 		use_rpath = 1;
 	}
 
-#if 0
-	/* Erik added this stuff in.  Disabled but kept in case the new changes */
-	/* don't do what he needed. */
-
-	/* FIXME: We need to work out the install vs use-in-built-dir
-	 * issue..*/
-	/* Apparently gcc doesn't accept this stuff via the command line */
-	setenv("COMPILER_PATH", UCLIBC_DIR"extra/gcc-uClibc/", 1);
-	setenv("LIBRARY_PATH", UCLIBC_DIR"lib/", 1);
-	/* The double '/' works around a gcc bug */
-	setenv("GCC_EXEC_PREFIX", UCLIBC_DIR"extra/gcc-uClibc//", 1); 
-#endif
-
 	for ( i = 1 ; i < argc ; i++ ) {
 		if (argv[i][0] == '-') { /* option */
 			switch (argv[i][1]) {
@@ -180,34 +170,40 @@ int main(int argc, char **argv)
 	}
 	if (use_stdinc) {
 		gcc_argv[i++] = nostdinc;
-		gcc_argv[i++] = uClibc_inc[0];
-		gcc_argv[i++] = uClibc_inc[1];
+		gcc_argv[i++] = uClibc_inc[use_build_dir];
 		gcc_argv[i++] = GCC_INCDIR;
 	}
 	if (linking && source_count) {
 		if (!use_static_linking) {
 			if (DYNAMIC_LINKER[0]) { /* not empty string */
+#if 0
 				gcc_argv[i++] = "-Wl,--dynamic-linker,"DYNAMIC_LINKER;
 				if (strstr(DYNAMIC_LINKER,"uclibc") != 0) {	/* custom linker */
 					use_rpath = 0; /* so -rpath not needed for normal case */
 				}
+#else
+				char *dlstr = "-Wl,--dynamic-linker,"DYNAMIC_LINKER;
+				if (strstr(DYNAMIC_LINKER,"uclibc") != 0) {	/* custom linker */
+					use_rpath = 0; /* so -rpath not needed for normal case */
+					if (use_build_dir) {
+						dlstr = "-Wl,--dynamic-linker," \
+							UCLIBC_BUILD_DIR DYNAMIC_LINKER;
+					}
+				}
+				gcc_argv[i++] = dlstr;
+#endif
 			}
-			if (use_rpath) {
-				gcc_argv[i++] = rpath[0];
-				gcc_argv[i++] = rpath[1];
+			if (use_build_dir || use_rpath) {
+				gcc_argv[i++] = rpath[use_build_dir];
 			}
 		}
-		gcc_argv[i++] = rpath_link[0]; /* just to be safe */
-		gcc_argv[i++] = rpath_link[1]; /* just to be safe */
-		gcc_argv[i++] = lib_path[0];
-		gcc_argv[i++] = lib_path[1];
+		gcc_argv[i++] = rpath_link[use_build_dir]; /* just to be safe */
+		gcc_argv[i++] = lib_path[use_build_dir];
+		if (!use_build_dir) {
+			gcc_argv[i++] = usr_lib_path;
+		}
 		if (use_start) {
-			struct stat buf;
-			if (stat(crt0_path[0], &buf) >= 0) {
-				gcc_argv[i++] = crt0_path[0];
-			} else {
-				gcc_argv[i++] = crt0_path[1];
-			}
+			gcc_argv[i++] = crt0_path[use_build_dir];
 		}
 		if (use_stdlib) {
 			gcc_argv[i++] = nostdlib;