bro-musl.patch

--- bro-orig/CMakeLists.txt
+++ bro/CMakeLists.txt
@@ -105,6 +105,29 @@
     list(APPEND OPTLIBS ${LibGeoIP_LIBRARY})
 endif ()
 
+if (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
+    EXECUTE_PROCESS(
+        COMMAND cat /etc/os-release
+        COMMAND grep ^ID=
+        COMMAND awk -F= "{ print $2 }"
+        COMMAND tr "\n" " "
+        COMMAND sed "s/ //"
+        COMMAND sed "s/^\"//"
+        COMMAND sed "s/\"$//"
+        OUTPUT_VARIABLE SYSTEMD_ID
+        RESULT_VARIABLE SYSTEMD_ID_RESULT
+    )
+    if(${SYSTEMD_ID} STREQUAL "alpine")
+        find_package(FTS)
+        if (FTS_FOUND)
+            include_directories(BEFORE ${fts_INCLUDE_DIR})
+            list(APPEND OPTLIBS ${fts_LIBRARY})
+        else ()
+            message(FATAL_ERROR "missing fts and fts-dev for alpine linux.")
+        endif ()
+    endif ()
+endif ()
+
 set(HAVE_PERFTOOLS false)
 set(USE_PERFTOOLS_DEBUG false)
 set(USE_PERFTOOLS_TCMALLOC false)
--- bro-orig/src/OSFinger.h
+++ bro/src/OSFinger.h
@@ -166,3 +166,57 @@
 #define MATCHFUZZY      0x2
 
 #endif
+
+// For musl-libc
+#ifndef  TCPOPT_EOL
+# define        TCPOPT_EOL   0
+#endif
+
+#ifndef TCPOPT_NOP
+# define TCPOPT_NOP             1
+#endif
+
+#ifndef TCPOPT_MAXSEG
+# define TCPOPT_MAXSEG          2
+#endif
+
+#ifndef TCPOLEN_MAXSEG
+# define TCPOLEN_MAXSEG         4
+#endif
+
+#ifndef TCPOPT_WINDOW
+# define TCPOPT_WINDOW          3
+#endif
+
+#ifndef TCPOLEN_WINDOW
+# define TCPOLEN_WINDOW         3
+#endif
+
+#ifndef TCPOPT_SACK_PERMITTED
+# define TCPOPT_SACK_PERMITTED  4               /* Experimental */
+#endif
+
+#ifndef TCPOLEN_SACK_PERMITTED
+# define TCPOLEN_SACK_PERMITTED 2
+#endif
+
+#ifndef TCPOPT_SACK
+# define TCPOPT_SACK            5               /* Experimental */
+#endif
+
+#ifndef TCPOPT_TIMESTAMP
+# define TCPOPT_TIMESTAMP       8
+#endif
+
+#ifndef TCPOLEN_TIMESTAMP
+# define TCPOLEN_TIMESTAMP      10
+#endif
+
+#ifndef TCPOLEN_TSTAMP_APPA
+# define TCPOLEN_TSTAMP_APPA    (TCPOLEN_TIMESTAMP+2) /* appendix A */
+#endif
+
+#ifndef TCPOPT_TSTAMP_HDR
+# define TCPOPT_TSTAMP_HDR      \
+    (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
+#endif