XXX add basic buildinfo ideas

Add basic buildinfo ideas, quick and dirty and not tested comprehensively:

  * Define build information for libavrdude and the avrdude tool

  * Switch from getopt() to getopt_long() (available on GNU, BSD, and
    the existing msvc/getopt.[ch] already implement getopt_long() on
    Windows)

  * Add a long "--version" argument which shows a long version message.

CMakeLists.txt

@@ -49,6 +49,7 @@ include(FindPackageMessage)
 include(GNUInstallDirs)
 
 set(CONFIG_DIR "${CMAKE_INSTALL_FULL_SYSCONFDIR}")
+set(AVRDUDE_BUILDSYSTEM "cmake")
 set(AVRDUDE_FULL_VERSION ${CMAKE_PROJECT_VERSION})
 
 # =====================================

src/CMakeLists.txt

@@ -170,6 +170,7 @@ add_library(libavrdude
     avrpart.c
     bitbang.c
     bitbang.h
+    buildinfo.c
     buspirate.c
     buspirate.h
     butterfly.c

src/Makefile.am

@@ -104,6 +104,7 @@ libavrdude_a_SOURCES = \
 	avr_opcodes.c \
 	bitbang.c \
 	bitbang.h \
+	buildinfo.c \
 	buspirate.c \
 	buspirate.h \
 	butterfly.c \

src/buildinfo.c

@@ -0,0 +1,51 @@
+#include <libavrdude.h>
+
+#include "ac_cfg.h"
+
+static
+const char *const libavrdude_buildinfo[] = {
+  AVRDUDE_FULL_VERSION,
+  "buildsystem: " AVRDUDE_BUILDSYSTEM,
+#ifdef HAVE_LIBELF
+  "libelf",
+#endif
+#ifdef HAVE_LIBUSB
+  "libusb",
+#endif
+#ifdef HAVE_LIBUSB_1_0
+  "libusb_1_0",
+#endif
+#ifdef HAVE_LIBHIDAPI
+  "libhidapi",
+#endif
+#ifdef HAVE_LIBHID
+  "libhid",
+#endif
+#ifdef HAVE_LIBFTDI
+  "libftdi",
+#endif
+#ifdef HAVE_LIBFTDI1
+  "libftdi1",
+#endif
+#ifdef HAVE_LIBREADLINE
+  "libreadline",
+#endif
+#ifdef HAVE_LIBSERIALPORT
+  "libserialport",
+#endif
+#ifdef HAVE_PARPORT
+  "parport",
+#endif
+#ifdef HAVE_LINUXGPIO
+  "linuxgpio",
+#endif
+#ifdef HAVE_LINUXSPI
+  "linuxspi",
+#endif
+  NULL
+};
+
+const char *const *avr_get_buildinfo(void)
+{
+  return libavrdude_buildinfo;
+}

src/cmake_config.h.in

@@ -21,6 +21,7 @@
 #endif
 
 #define AVRDUDE_FULL_VERSION "@AVRDUDE_FULL_VERSION@"
+#define AVRDUDE_BUILDSYSTEM "@AVRDUDE_BUILDSYSTEM@"
 
 /* Options */
 

src/configure.ac

@@ -84,6 +84,9 @@ AC_DEFINE_UNQUOTED([AVRDUDE_FULL_VERSION], ["$AVRDUDE_FULL_VERSION"],
                    [The full avrdude version as displayed in -? and avrdude.conf])
 AC_SUBST([AVRDUDE_FULL_VERSION])
 
+AC_DEFINE_UNQUOTED([AVRDUDE_BUILDSYSTEM], ["autotools"],
+                   [The buildsystem used to build avrdude])
+
 
 # Checks for programs.
 AC_PROG_CC

src/libavrdude.h

@@ -1184,6 +1184,8 @@ int avr_page_erase_cached(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM
 int avr_flush_cache(const PROGRAMMER *pgm, const AVRPART *p);
 int avr_reset_cache(const PROGRAMMER *pgm, const AVRPART *p);
 
+const char *const *avr_get_buildinfo(void);
+
 #ifdef __cplusplus
 }
 #endif

src/main.c

@@ -45,6 +45,8 @@
 #include <sys/stat.h>
 #include <sys/time.h>
 
+#include <getopt.h>
+
 #include "avrdude.h"
 #include "libavrdude.h"
 #include "config.h"
@@ -216,6 +218,39 @@ const char *pgmid;              // Programmer -c string
 
 static char usr_config[PATH_MAX]; // Per-user config file
 
+
+static
+const char *const avrdude_buildinfo[] = {
+  AVRDUDE_FULL_VERSION,
+  "buildsystem: " AVRDUDE_BUILDSYSTEM,
+  NULL
+};
+
+
+static void print_buildinfos(const char *const *buildinfo)
+{
+  for (unsigned int i=1; buildinfo[i]; ++i) {
+    msg_info("%3u. %s\n", i, buildinfo[i]);
+  }
+}
+
+
+static void print_version_message(void)
+{
+  msg_info("avrdude (...) %s\n", AVRDUDE_FULL_VERSION);
+  msg_info("Copyright (C) ...2024...\n");
+  msg_info("License GPL...\n");
+  msg_info("This is free software...\n");
+
+  msg_info("avrdude %s\n", avrdude_buildinfo[0]);
+  print_buildinfos(avrdude_buildinfo);
+
+  const char *const *libavrdude_buildinfo = avr_get_buildinfo();
+  msg_info("libavrdude %s\n", libavrdude_buildinfo[0]);
+  print_buildinfos(libavrdude_buildinfo);
+}
+
+
 /*
  * usage message
  */
@@ -262,6 +297,7 @@ static void usage(void)
     "  -v                     Verbose output; -v -v for more\n"
     "  -q                     Quell progress output; -q -q for less\n"
     "  -l logfile             Use logfile rather than stderr for diagnostics\n"
+    "  --version              Display build and version information\n"
     "  -?                     Display this usage\n"
     "\navrdude version %s, https://github.com/avrdudes/avrdude\n",
     progname, strlen(cfg) < 24? "config file ": "", cfg, AVRDUDE_FULL_VERSION);
@@ -770,7 +806,15 @@ int main(int argc, char * argv [])
   /*
    * process command line arguments
    */
-  while ((ch = getopt(argc, argv, "?Ab:B:c:C:DeE:Fi:l:nNp:OP:qrstT:U:uvVx:yY")) != -1) {
+#define LONGOPT_VERSION 0x2342
+  struct option longopts[] = {
+    {"help",    no_argument, NULL, '?'},
+    {"version", no_argument, NULL, LONGOPT_VERSION},
+    {NULL, 0, NULL, 0}
+  };
+  while ((ch = getopt_long(argc, argv,
+			   "?Ab:B:c:C:DeE:Fi:l:nNp:OP:qrstT:U:uvVx:yY",
+			   longopts, NULL)) != -1) {
 
     switch (ch) {
       case 'b': /* override default programmer baud rate */
@@ -927,6 +971,11 @@ int main(int argc, char * argv [])
         exit(0);
         break;
 
+      case LONGOPT_VERSION: /* version and build information */
+        print_version_message();
+        exit(0);
+        break;
+
       default:
         pmsg_error("invalid option -%c\n\n", ch);
         usage();