From b90552dfb1a3c4b36ec8028b3dba8103925c1203 Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Thu, 23 Jun 2022 16:23:46 -0500
Subject: [PATCH] fix Termux build

---
 CMakeLists.txt                 | 18 ++++++++++++++++++
 src/engine/platform/pcspkr.cpp | 18 ++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 82094ce00..4c00b62fe 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -537,6 +537,24 @@ endif()
 
 if (NOT WIN32 AND NOT APPLE)
   list(APPEND GUI_SOURCES src/gui/icon.c)
+
+  include(CheckIncludeFile)
+
+  CHECK_INCLUDE_FILE(sys/io.h SYS_IO_FOUND)
+  CHECK_INCLUDE_FILE(linux/input.h LINUX_INPUT_FOUND)
+  CHECK_INCLUDE_FILE(linux/kd.h LINUX_KD_FOUND)
+  if (SYS_IO_FOUND)
+    list(APPEND DEPENDENCIES_DEFINES HAVE_SYS_IO)
+    message(STATUS "PC speaker output: outb()")
+  endif()
+  if (LINUX_INPUT_FOUND)
+    list(APPEND DEPENDENCIES_DEFINES HAVE_LINUX_INPUT)
+    message(STATUS "PC speaker output: evdev")
+  endif()
+  if (LINUX_KD_FOUND)
+    list(APPEND DEPENDENCIES_DEFINES HAVE_LINUX_KD)
+    message(STATUS "PC speaker output: KIOCSOUND")
+  endif()
 endif()
 
 set(USED_SOURCES ${ENGINE_SOURCES} ${AUDIO_SOURCES} src/main.cpp)
diff --git a/src/engine/platform/pcspkr.cpp b/src/engine/platform/pcspkr.cpp
index d977690f5..57c72b677 100644
--- a/src/engine/platform/pcspkr.cpp
+++ b/src/engine/platform/pcspkr.cpp
@@ -27,11 +27,17 @@
 #include <sys/select.h>
 #include <fcntl.h>
 #include <unistd.h>
+#ifdef HAVE_LINUX_INPUT
 #include <linux/input.h>
+#endif
+#ifdef HAVE_LINUX_KD
 #include <linux/kd.h>
+#endif
 #include <time.h>
+#ifdef HAVE_SYS_IO
 #include <sys/io.h>
 #endif
+#endif
 
 #define PCSPKR_DIVIDER 4
 #define CHIP_DIVIDER 1
@@ -80,6 +86,7 @@ void DivPlatformPCSpeaker::pcSpeakerThread() {
     }
     if (beepFD>=0) {
       switch (realOutMethod) {
+#ifdef HAVE_LINUX_INPUT
         case 0: { // evdev
           static struct input_event ie;
           ie.time.tv_sec=r.tv_sec;
@@ -98,11 +105,14 @@ void DivPlatformPCSpeaker::pcSpeakerThread() {
           }
           break;
         }
+#endif
+#ifdef HAVE_LINUX_KD
         case 1: // KIOCSOUND (on tty)
           if (ioctl(beepFD,KIOCSOUND,r.val)<0) {
             logW("ioctl error! %s",strerror(errno));
           }
           break;
+#endif
         case 2: { // /dev/port
           unsigned char bOut;
           bOut=0;
@@ -144,11 +154,14 @@ void DivPlatformPCSpeaker::pcSpeakerThread() {
           }
           break;
         }
+#ifdef HAVE_LINUX_KD
         case 3: // KIOCSOUND (on stdout)
           if (ioctl(beepFD,KIOCSOUND,r.val)<0) {
             logW("ioctl error! %s",strerror(errno));
           }
           break;
+#endif
+#ifdef HAVE_SYS_IO
         case 4: // outb()
           if (r.val==0) {
             outb(inb(0x61)&(~3),0x61);
@@ -163,6 +176,7 @@ void DivPlatformPCSpeaker::pcSpeakerThread() {
             }
           }
           break;
+#endif
       }
     } else {
       //logV("not writing because fd is less than 0");
@@ -544,6 +558,7 @@ void DivPlatformPCSpeaker::reset() {
           break;
         case 4: // outb()
           beepFD=-1;
+#ifdef HAVE_SYS_IO
           if (ioperm(0x61,8,1)<0) {
             logW("ioperm 0x61: %s",strerror(errno));
             break;
@@ -557,6 +572,9 @@ void DivPlatformPCSpeaker::reset() {
             break;
           }
           beepFD=STDOUT_FILENO;
+#else
+          errno=ENOSYS;
+#endif
           break;
       }
       if (beepFD<0) {