From 46f663529320ad7c23ba0c7e0238596ab296624e Mon Sep 17 00:00:00 2001
From: AlaskanEmily <emily@alaskanemily.net>
Date: Sat, 2 May 2020 13:54:58 -0700
Subject: [PATCH] Fix compiling on OpenBSD for OSS rather than OpenAL

---
 src/GNUmakefile          | 5 +++++
 src/gcc.mk               | 4 ++--
 src/makefile             | 5 +++++
 src/oss/cin_oss.c        | 4 ----
 src/oss/cin_oss_driver.c | 9 ++++++++-
 src/oss/makefile         | 2 +-
 6 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/src/GNUmakefile b/src/GNUmakefile
index 8e7716a..044fee7 100755
--- a/src/GNUmakefile
+++ b/src/GNUmakefile
@@ -7,10 +7,15 @@ include gcc.mk
 
 BACKEND?=openal
 
+CURDIR=$(shell pwd)
 ifeq "$(BACKEND)" "dsound"
 LINK?=$(CXX)
 else ifeq "$(BACKEND)" "oss"
+
 EXTRALIBS=-lpthread
+# Get OSS emulation on BSD's
+EXTRALIBS+=$(if $(findstring $(shell uname),"BSD"),-lossaudio,)
+
 LINK?="$(CC)"
 else ifeq "$(BACKEND)" "openal"
 EXTRALIBS=-lopenal
diff --git a/src/gcc.mk b/src/gcc.mk
index 9ba1716..773cba4 100755
--- a/src/gcc.mk
+++ b/src/gcc.mk
@@ -8,8 +8,8 @@ CIN_DEBUGFLAGS?= -g
 CC?=gcc
 CXX?=g++
 CCFLAGS?=-Wall -Wextra -pedantic -Wshadow -Wenum-compare -Wno-switch $(CIN_DEBUGFLAGS) $(CIN_FPICFLAGS)
-CFLAGS?=$(CCFLAGS) -ansi
-CXXFLAGS?=$(CCFLAGS) -std=c++98 -fno-rtti -fno-exceptions
+CFLAGS=$(CCFLAGS) -ansi
+CXXFLAGS=$(CCFLAGS) -std=c++98 -fno-rtti -fno-exceptions
 AR?=ar
 RANLIB?=ranlib
 LINKFLAGS?=$(CIN_DEBUGFLAGS) $(CIN_FPICFLAGS)
diff --git a/src/makefile b/src/makefile
index 1db1299..d565826 100755
--- a/src/makefile
+++ b/src/makefile
@@ -7,10 +7,15 @@
 
 BACKEND?=oss
 
+CURDIR=${PWD}
 .if "${BACKEND}" == "dsound"
 LINK?=$(CXX)
 .else
 LINK=$(CC)
 .endif
 
+.if ${BACKEND} == oss
+EXTRALIBS=-lossaudio -lpthread
+.endif
+
 .include "unix.mk"
diff --git a/src/oss/cin_oss.c b/src/oss/cin_oss.c
index 21a63eb..730cf97 100644
--- a/src/oss/cin_oss.c
+++ b/src/oss/cin_oss.c
@@ -14,10 +14,6 @@
 #define _DEFAULT_SOURCE
 #define _BSD_SOURCE
 
-#if defined __GNUC__
-#include <alloca.h>
-#endif
-
 #include <assert.h>
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/src/oss/cin_oss_driver.c b/src/oss/cin_oss_driver.c
index 23fac52..c7cba5c 100644
--- a/src/oss/cin_oss_driver.c
+++ b/src/oss/cin_oss_driver.c
@@ -323,7 +323,8 @@ enum Cin_DriverError Cin_CreateDriver(struct Cin_Driver *drv){
     drv->id_counter = 0;
     
     {
-        int dev = -1, val = 0;
+        int dev = -1, val;
+        char buffer[] = "/dev/audio\0";
         const char *const devname = getenv("AUDIODEV");
         if(devname != NULL)
             dev = open(devname, O_WRONLY);
@@ -331,6 +332,12 @@ enum Cin_DriverError Cin_CreateDriver(struct Cin_Driver *drv){
         if(dev == -1 && devname == NULL)
             dev = open("/dev/dsp", O_WRONLY);
         
+        /* Some BSD systems have /dev/audio* instead. */
+        for(val = 0; dev == -1 && val <= 10; val++){
+            dev = open(buffer, O_WRONLY);
+            buffer[sizeof(buffer)-2] = '0' + val;
+        }
+
         if(dev == -1){
             ret = Cin_eDriverNoDevice;
             goto fail_mutex;
diff --git a/src/oss/makefile b/src/oss/makefile
index c8008ac..6b379c4 100644
--- a/src/oss/makefile
+++ b/src/oss/makefile
@@ -16,7 +16,7 @@ libcin_oss_x.a: $(OBJECTS)
 
 libcin_oss.a: $(CIN_COMMONLIB) $(CIN_MIXERLIB) libcin_oss_x.a
 	if [ -f libcin_oss2.a ] ; then rm libcin_oss2.a ; fi
-	echo 'create libcin_oss2.a\naddlib libcin_oss_x.a\naddlib $(CIN_COMMONLIB)\naddlib $(CIN_MIXERLIB)\nsave\nend\n' | $(AR) M
+	echo 'create libcin_oss2.a\naddlib libcin_oss_x.a\naddlib $(CIN_COMMONLIB)\naddlib $(CIN_MIXERLIB)\nsave\nend\n' | $(AR) -M
 	$(RANLIB) libcin_oss2.a
 	mv libcin_oss2.a libcin_oss.a
 
-- 
2.11.0