Fixes buffer overflows and --as-needed issues

https://bugs.gentoo.org/show_bug.cgi?id=338936

Patch written by Kevin Pyle <gentoo.8eaf7cd8e5128d8191fe@spamgourmet.com>
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,4 @@
-AM_CPPFLAGS =	@CPPFLAGS@ @INTERLACE@ \
+AM_CPPFLAGS =	 @INTERLACE@ \
 		-DGLOBAL_BB=\"$(datadir)/bbtools/bbacpi.bb\" \
 		-DGLOBAL_NOBB=\"$(datadir)/bbtools/bbacpi.nobb\" \
 		-DGLOBAL_DATA=\"$(datadir)/bbtools\"
--- a/bbacpi.cc
+++ b/bbacpi.cc
@@ -167,7 +167,7 @@ bool CheckLoad::checkbatteryfile (char* name, char* device)
   if (ret = (fp = fopen(name, "r"))) {
     char buffer[100];
     char present[20];
-    fgets(buffer,128,fp);
+    fgets(buffer, sizeof(buffer),fp);
     sscanf(buffer,"present:                 %s", present);
     if (strncmp(present, "yes", 3) != 0) {
       fprintf(stderr, "Device %s not present.\n", device);
@@ -195,7 +195,7 @@ void CheckLoad::ReadStaticInfo()
     {
       /* Read data in any order */
       found = 0;
-      while (found < 11 && (fgets(buffer, 63, fp) != NULL)) {
+      while (found < 11 && (fgets(buffer, sizeof(buffer), fp) != NULL)) {
 	/* Present */
 	if (strncmp(buffer, "present:", 7) == 0 
 	    || strncmp(buffer, "Present:", 7) == 0) {
@@ -277,7 +277,7 @@ void CheckLoad::ReadStaticInfo()
       {
 	/* Read data in any order */
 	found = 0;
-	while (found < 11  && (fgets(buffer, 63, fp) != NULL)) {
+	while (found < 11  && (fgets(buffer, sizeof(buffer), fp) != NULL)) {
 	  /* Present */
 	  if (strncmp(buffer, "present:", 7) == 0 
 	      || strncmp(buffer, "Present:", 7) == 0) {
@@ -361,7 +361,7 @@ void CheckLoad::ReadStaticInfo()
   if ((fp = fopen(names.temptrip, "r")))
     {
       found = 0;
-      while (found < 2 && (fgets(buffer,128,fp) != NULL)) {
+      while (found < 2 && (fgets(buffer, sizeof(buffer),fp) != NULL)) {
 	/* Critical */
 	if (strncmp(buffer, "critical", 8) == 0 
 	    || strncmp(buffer, "Critical", 8) == 0) {
@@ -425,7 +425,7 @@ void CheckLoad::Reconfigure()
 	if  (file_status.st_mtime != last_mtime)
 	  {
 	    found = 0;
-	    while (found < 4 && (fgets(buffer, 63, fp) != NULL)) {
+	    while (found < 4 && (fgets(buffer, sizeof(buffer), fp) != NULL)) {
 	      /* Charging state */
 	      if (strncmp(buffer, "charging state:", 15) == 0 
 		  || strncmp(buffer, "Charging State:", 15) == 0) {
@@ -463,7 +463,7 @@ void CheckLoad::Reconfigure()
 	if  (file_status.st_mtime != last_mtime)
 	  {
 	    found = 0;
-	    while (found < 4 && (fgets(buffer, 63, fp) != NULL)) {
+	    while (found < 4 && (fgets(buffer, sizeof(buffer), fp) != NULL)) {
 	      /* Charging state */
 	      if (strncmp(buffer, "charging state:", 15) == 0 
 		  || strncmp(buffer, "Charging State:", 15) == 0) {
@@ -497,7 +497,7 @@ void CheckLoad::Reconfigure()
   if ((fp = fopen(names.adapter, "r")))
     {
       found = 0;
-      while (found < 1 && (fgets(buffer, 63,fp) != NULL)) {
+      while (found < 1 && (fgets(buffer, sizeof(buffer),fp) != NULL)) {
 	if (strncmp(buffer, "state:", 6) == 0 
 	    || strncmp(buffer, "State:", 6) == 0) {
 	  sscanf(buffer+offset,"%s", adapter.state);
@@ -511,7 +511,7 @@ void CheckLoad::Reconfigure()
   if ((fp = fopen(names.temperature, "r")))
     {
       found = 0;
-      while (found < 1 && (fgets(buffer, 63,fp) != NULL)) {
+      while (found < 1 && (fgets(buffer, sizeof(buffer),fp) != NULL)) {
 	if (strncmp(buffer, "temperature:", 12) == 0 
 	    || strncmp(buffer, "Temperature:", 12) == 0) {
 	  sscanf(buffer+offset,"%u", &temperature.celcius);
--- a/configure.in
+++ b/configure.in
@@ -89,12 +89,12 @@ AC_PATH_XTRA
 
 CFLAGS="$CFLAGS $X_CFLAGS"
 CXXFLAGS="$CXXFLAGS $X_CFLAGS"
-LDFLAGS="$LDFLAGS $X_LIBS $X_PRE_LIBS"
+LIBS="$LIBS $X_LIBS $X_PRE_LIBS"
 dnl Checks for X libraries.
-AC_CHECK_LIB(X11, XOpenDisplay, LDFLAGS="$LDFLAGS -lX11",
+AC_CHECK_LIB(X11, XOpenDisplay,,
              AC_MSG_ERROR(XOpenDisplay not found in -lX11))
 
-LDFLAGS="$LDFLAGS $X_EXTRA_LIBS"
+LIBS="$LIBS $X_EXTRA_LIBS"
 
 dnl Check for Imlib
 AC_MSG_CHECKING([for Imlib])