Add a get_compiler_info() routine in libwsutil to get compiler information.

Change-Id: I8ccb6187f2ee0255460f448aee170768b6fa3f5d
Reviewed-on: https://code.wireshark.org/review/2519
Reviewed-by: Guy Harris <guy@alum.mit.edu>

4 files changed, 152 insertions, 0 deletions

diff --git a/wsutil/CMakeLists.txt b/wsutil/CMakeLists.txt
index e344fd205f..a08787a1c7 100644
--- a/wsutil/CMakeLists.txt
+++ b/wsutil/CMakeLists.txt
@@ -45,6 +45,7 @@ set(WSUTIL_FILES
 	base64.c
 	bitswap.c
 	cfutils.c
+	compiler_info.c
 	copyright_info.c
 	crash_info.c
 	crc10.c
diff --git a/wsutil/Makefile.common b/wsutil/Makefile.common
index ff747ea5cb..f040ea57d3 100644
--- a/wsutil/Makefile.common
+++ b/wsutil/Makefile.common
@@ -33,6 +33,7 @@ LIBWSUTIL_SRC = 	\
 	base64.c	\
 	bitswap.c	\
 	cfutils.c	\
+	compiler_info.c	\
 	copyright_info.c \
 	crash_info.c	\
 	crc6.c		\
@@ -77,6 +78,7 @@ LIBWSUTIL_INCLUDES = 	\
 	bits_count_ones.h	\
 	bitswap.h		\
 	cfutils.h	\
+	compiler_info.h	\
 	copyright_info.h \
 	crash_info.h	\
 	crc6.h		\
diff --git a/wsutil/compiler_info.c b/wsutil/compiler_info.c
new file mode 100644
index 0000000000..df77e5c425
--- /dev/null
+++ b/wsutil/compiler_info.c
@@ -0,0 +1,110 @@
+/* compiler_info.c
+ * Routines to report information about the compiler used to compile
+ * Wireshark
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+
+#include <glib.h>
+
+#include <wsutil/compiler_info.h>
+
+/*
+ * Get compiler information, and append it to the GString.
+ */
+void
+get_compiler_info(GString *str)
+{
+	/*
+	 * See https://sourceforge.net/apps/mediawiki/predef/index.php?title=Compilers
+	 * information on various defined strings.
+	 *
+	 * GCC's __VERSION__ is a nice text string for humans to
+	 * read.  The page at sourceforge.net largely describes
+	 * numeric #defines that encode the version; if the compiler
+	 * doesn't also offer a nice printable string, we try prettifying
+	 * the number somehow.
+	 */
+#if defined(__GNUC__) && defined(__VERSION__)
+	/*
+	 * Clang and llvm-gcc also define __GNUC__ and __VERSION__;
+	 * distinguish between them.
+	 */
+#if defined(__clang__)
+	g_string_append_printf(str, "\n\nBuilt using clang %s.\n", __VERSION__);
+#elif defined(__llvm__)
+	g_string_append_printf(str, "\n\nBuilt using llvm-gcc %s.\n", __VERSION__);
+#else /* boring old GCC */
+	g_string_append_printf(str, "\n\nBuilt using gcc %s.\n", __VERSION__);
+#endif /* llvm */
+#elif defined(__HP_aCC)
+	g_string_append_printf(str, "\n\nBuilt using HP aCC %d.\n", __HP_aCC);
+#elif defined(__xlC__)
+	g_string_append_printf(str, "\n\nBuilt using IBM XL C %d.%d\n",
+	    (__xlC__ >> 8) & 0xFF, __xlC__ & 0xFF);
+#ifdef __IBMC__
+	if ((__IBMC__ % 10) != 0)
+		g_string_append_printf(str, " patch %d", __IBMC__ % 10);
+#endif /* __IBMC__ */
+	g_string_append_printf(str, "\n");
+#elif defined(__INTEL_COMPILER)
+	g_string_append_printf(str, "\n\nBuilt using Intel C %d.%d",
+	    __INTEL_COMPILER / 100, (__INTEL_COMPILER / 10) % 10);
+	if ((__INTEL_COMPILER % 10) != 0)
+		g_string_append_printf(str, " patch %d", __INTEL_COMPILER % 10);
+#ifdef __INTEL_COMPILER_BUILD_DATE
+	g_string_sprinta(str, ", compiler built %04d-%02d-%02d",
+	    __INTEL_COMPILER_BUILD_DATE / 10000,
+	    (__INTEL_COMPILER_BUILD_DATE / 100) % 100,
+	    __INTEL_COMPILER_BUILD_DATE % 100);
+#endif /* __INTEL_COMPILER_BUILD_DATE */
+	g_string_append_printf(str, "\n");
+#elif defined(_MSC_FULL_VER)
+# if _MSC_FULL_VER > 99999999
+	g_string_append_printf(str, "\n\nBuilt using Microsoft Visual C++ %d.%d",
+			       (_MSC_FULL_VER / 10000000) - 6,
+			       (_MSC_FULL_VER / 100000) % 100);
+#  if (_MSC_FULL_VER % 100000) != 0
+	g_string_append_printf(str, " build %d",
+			       _MSC_FULL_VER % 100000);
+#  endif
+# else
+	g_string_append_printf(str, "\n\nBuilt using Microsoft Visual C++ %d.%d",
+			       (_MSC_FULL_VER / 1000000) - 6,
+			       (_MSC_FULL_VER / 10000) % 100);
+#  if (_MSC_FULL_VER % 10000) != 0
+	g_string_append_printf(str, " build %d",
+			       _MSC_FULL_VER % 10000);
+#  endif
+# endif
+	g_string_append_printf(str, "\n");
+#elif defined(_MSC_VER)
+	/* _MSC_FULL_VER not defined, but _MSC_VER defined */
+	g_string_append_printf(str, "\n\nBuilt using Microsoft Visual C++ %d.%d\n",
+	    (_MSC_VER / 100) - 6, _MSC_VER % 100);
+#elif defined(__SUNPRO_C)
+	g_string_append_printf(str, "\n\nBuilt using Sun C %d.%d",
+	    (__SUNPRO_C >> 8) & 0xF, (__SUNPRO_C >> 4) & 0xF);
+	if ((__SUNPRO_C & 0xF) != 0)
+		g_string_append_printf(str, " patch %d", __SUNPRO_C & 0xF);
+	g_string_append_printf(str, "\n");
+#endif
+}
diff --git a/wsutil/compiler_info.h b/wsutil/compiler_info.h
new file mode 100644
index 0000000000..e64175d4de
--- /dev/null
+++ b/wsutil/compiler_info.h
@@ -0,0 +1,39 @@
+/* compiler_info.h
+ * Declarations of outines to report information about the compiler used
+ * to compile Wireshark
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __WSUTIL_COMPILER_INFO_H__
+#define __WSUTIL_COMPILER_INFO_H__
+
+#include "ws_symbol_export.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+WS_DLL_PUBLIC void get_compiler_info(GString *str);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __WSUTIL_COMPILER_INFO_H__ */