Remove -O3 and -Werror.

Index: dooble.pro
--- dooble.pro.orig
+++ dooble.pro
@@ -9,8 +9,9 @@ macx {
 CONVERT_DICT = ""
 } else {
 versionAtLeast(QT_VERSION, 6.0.0) {
-freebsd-* {
+openbsd-* {
 CONVERT_DICT = "/usr/local/libexec/qt6/qwebengine_convert_dict"
+CONVERT_DICT = "${LOCALBASE}/lib/qt6/libexec/qwebengine_convert_dict"
 } else:win32 {
 qtPrepareTool(CONVERT_DICT, qwebengine_convert_dict)
 } else {
@@ -262,14 +263,12 @@ TEMPLATE	= app
 
 QMAKE_CLEAN     += Dooble
 
-freebsd-* {
+freebsd-*|openbsd-* {
 # Enable only if FreeBSD's Qt and WebEngine versions differ.
 DEFINES -= DOOBLE_FREEBSD_WEBENGINE_MISMATCH
-QMAKE_CXXFLAGS_RELEASE += -O3 \
-                          -Wall \
+QMAKE_CXXFLAGS_RELEASE += -Wall \
                           -Wcast-align \
                           -Wcast-qual \
-                          -Werror \
                           -Wextra \
                           -Wformat=2 \
                           -Wold-style-cast \
@@ -285,7 +284,6 @@ QMAKE_CXXFLAGS_RELEASE += -O3 \
                           -fwrapv \
                           -pedantic \
                           -std=c++17
-QMAKE_CXXFLAGS_RELEASE -= -O2
 } else:macx {
 QMAKE_APPLE_DEVICE_ARCHS = arm64 x86_64
 QMAKE_CXXFLAGS_RELEASE += -O3 \
