$NetBSD$

Fix the build on NetBSD and macOS

Also install bsddialog_theme.h

--- lib/Makefile.orig	2024-12-02 18:36:02.000000000 +0000
+++ lib/Makefile
@@ -3,8 +3,9 @@
 #
 # Written in 2021 by Alfonso Sabato Siciliano
 
+SOEXT = so
 LIBRARY = bsddialog
-LIBRARY_SO = lib${LIBRARY:=.so}
+LIBRARY_SO = lib${LIBRARY:=.${SOEXT}}
 LIBRARY_A = lib${LIBRARY:=.a}
 HEADERS = bsddialog.h bsddialog_theme.h bsddialog_progressview.h
 SOURCES = barbox.c datebox.c formbox.c libbsddialog.c lib_util.c \
@@ -15,11 +16,8 @@ PREFIX = /usr/local
 .if defined(DEBUG)
 CFLAGS += -g
 .endif
-CFLAGS += -D_XOPEN_SOURCE_EXTENDED -fPIC -Wall -Wextra -std=gnu99 \
-	-fstack-protector-strong
-LDFLAGS += -fstack-protector-strong -shared -Wl,-x -Wl,--fatal-warnings \
-	-Wl,--warn-shared-textrel -Wl,-soname,${LIBRARY_SO}.${VERSION} \
-	-L/usr/lib -lncursesw -ltinfow
+CFLAGS += -D_XOPEN_SOURCE_EXTENDED -fPIC -Wall -Wextra -std=gnu99
+LDFLAGS += -shared -L${PREFIX}/lib -Wl,-rpath,${PREFIX}/lib -lcurses
 
 LN = ln -s -f
 RM = rm -f
@@ -29,6 +27,7 @@ all: ${LIBRARY}
 install: all
 	${INSTALL} -m 0644 bsddialog.h ${DESTDIR}${PREFIX}/include/bsddialog.h
 	${INSTALL} -m 0644 bsddialog_progressview.h ${DESTDIR}${PREFIX}/include/bsddialog_progressview.h
+	${INSTALL} -m 0644 bsddialog_theme.h ${DESTDIR}${PREFIX}/include/bsddialog_theme.h
 	${INSTALL} -m 0644 ${LIBRARY_A} ${DESTDIR}${PREFIX}/lib/${LIBRARY_A}
 	${INSTALL} -m 0755 ${LIBRARY_SO}.${VERSION} ${DESTDIR}${PREFIX}/lib/${LIBRARY_SO}.${VERSION}
 	${LN} ${LIBRARY_SO}.${VERSION} ${DESTDIR}${PREFIX}/lib/${LIBRARY_SO}
@@ -36,6 +35,7 @@ install: all
 uninstall:
 	${RM} ${DESTDIR}${PREFIX}/include/bsddialog.h
 	${RM} ${DESTDIR}${PREFIX}/include/bsddialog_progressview.h
+	${RM} ${DESTDIR}${PREFIX}/include/bsddialog_theme.h
 	${RM} ${DESTDIR}${PREFIX}/lib/${LIBRARY_A}
 	${RM} ${DESTDIR}${PREFIX}/lib/${LIBRARY_SO}.${VERSION}
 	${RM} ${DESTDIR}${PREFIX}/lib/${LIBRARY_SO}