Fixes build with C99/c23 compilers by including a patch from
arcctgx@poczta.onet.pl at https://bugs.gentoo.org/881143#c8
Folds all seds into a patch
https://bugs.gentoo.org/881143
--- a/build.sh
+++ b/build.sh
@@ -16,11 +16,11 @@
 BASIC_CFLAGS="-Wall -Wno-format -I/usr/local/include/ \
               -I/opt/local/include/ -DVERSION=\"$VERSION\" $CFLAGS"
 
 BASIC_LDFLAGS="-L/usr/local/lib/ -L/opt/local/lib $LDFLAGS"
 
-USE_CFLAGS="-fstack-protector-all -fPIE -D_FORTIFY_SOURCE=2 -g -ggdb \
+USE_CFLAGS="-fstack-protector-all -fPIE -D_FORTIFY_SOURCE=2  \
             $BASIC_CFLAGS"
 
 USE_LDFLAGS="-Wl,-z,relro -pie $BASIC_LDFLAGS"
 
 if [ "$OSTYPE" = "cygwin" ]; then
@@ -79,12 +79,12 @@
   exit 0
 
 elif [ "$1" = "all" -o "$1" = "" ]; then
 
   echo "[+] Configuring production build."
-  BASIC_CFLAGS="$BASIC_CFLAGS -O3"
-  USE_CFLAGS="$USE_CFLAGS -O3"
+  BASIC_CFLAGS="$BASIC_CFLAGS"
+  USE_CFLAGS="$USE_CFLAGS"
 
 elif [ "$1" = "debug" ]; then
 
   echo "[+] Configuring debug build."
   BASIC_CFLAGS="$BASIC_CFLAGS -DDEBUG_BUILD=1"
@@ -195,11 +195,11 @@
 
 echo -n "[*] Checking if memory alignment is required... "
 
 rm -f "$TMP" "$TMP.c" "$TMP.log" || exit 1
 
-echo -e "#include \"types.h\"\nvolatile u8 tmp[6]; int main() { printf(\"%d\x5cn\", *(u32*)(tmp+1)); return 0; }" >"$TMP.c" || exit 1
+echo -e "#include <stdio.h>\n#include \"types.h\"\nvolatile u8 tmp[6]; int main() { printf(\"%d\x5cn\", *(u32*)(tmp+1)); return 0; }" >"$TMP.c" || exit 1
 $CC $USE_CFLAGS $USE_LDFLAGS "$TMP.c" -o "$TMP" &>"$TMP.log"
 
 if [ ! -x "$TMP" ]; then
 
   echo "FAIL"
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -5,13 +5,13 @@
 # Copyright (C) 2012 by Michal Zalewski <lcamtuf@coredump.cx>
 #
 # Distributed under the terms and conditions of GNU LGPL.
 #
 
-CC      = gcc
-CFLAGS  = -g -ggdb -Wall -Wno-format -funsigned-char
-LDFLAGS =
+CC      ?= gcc
+CFLAGS  +=  -Wall -Wno-format -funsigned-char
+LDFLAGS +=
 TARGETS = p0f-client p0f-sendsyn p0f-sendsyn6
 
 all: $(TARGETS)
 
 clean: