From: Timo Sirainen <timo.sirainen@open-xchange.com>
Date: Mon, 23 Mar 2020 16:28:34 +0000 (+0200)
Subject: configure: Add --with-fuzzer=clang to use clang fuzzer
X-Git-Tag: 2.3.14.rc1~182
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=715d3aca5a3fc6afb1ab43252d3a1e3ccab4c8bb;p=thirdparty%2Fdovecot%2Fcore.git

configure: Add --with-fuzzer=clang to use clang fuzzer
---

diff --git a/configure.ac b/configure.ac
index aa6e9e6441..ae17717948 100644
--- a/configure.ac
+++ b/configure.ac
@@ -310,6 +310,7 @@ AC_CHECK_HEADERS(strings.h stdint.h unistd.h dirent.h malloc.h \
 CC_CLANG
 AC_LD_WHOLE_ARCHIVE
 DC_DOVECOT_HARDENING
+DC_DOVECOT_FUZZER
 DC_DOVECOT_CFLAGS
 
 DOVECOT_NSL
diff --git a/m4/dovecot.m4 b/m4/dovecot.m4
index 2b5d8957e5..02bdd406a1 100644
--- a/m4/dovecot.m4
+++ b/m4/dovecot.m4
@@ -335,6 +335,27 @@ AC_DEFUN([DC_DOVECOT_HARDENING],[
 	DOVECOT_WANT_UBSAN
 ])
 
+AC_DEFUN([DC_DOVECOT_FUZZER],[
+        AC_ARG_WITH(fuzzer,
+        AS_HELP_STRING([--with-fuzzer=clang], [Build with clang fuzzer (default: no)]),
+                with_fuzzer=$withval,
+                with_fuzzer=no)
+	AS_IF([test x$with_fuzzer = xclang], [
+		CFLAGS="$CFLAGS -fsanitize=fuzzer-no-link"
+		# use $LIB_FUZZING_ENGINE for linking if it exists
+		FUZZER_LDFLAGS=${LIB_FUZZING_ENGINE--fsanitize=fuzzer}
+		# May need to use CXXLINK for linking, which wants sources to
+		# be compiled with -fPIE
+		FUZZER_CPPFLAGS='$(AM_CPPFLAGS) -fPIE -DPIE'
+	], [test x$with_fuzzer != xno], [
+		AC_MSG_ERROR([Unknown fuzzer $with_fuzzer])
+	])
+	AC_SUBST([FUZZER_CPPFLAGS])
+	AC_SUBST([FUZZER_LDFLAGS])
+	AM_CONDITIONAL([USE_FUZZER], [test "x$with_fuzzer" != "xno"])
+
+])
+
 AC_DEFUN([DC_DOVECOT],[
 	AC_ARG_WITH(dovecot,
 	  [  --with-dovecot=DIR      Dovecot base directory],