[PATCH v13 5/5] bugreport: add compiler info

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To help pinpoint the source of a regression, it is useful to know some
info about the compiler which the user's Git client was built with. By
adding a generic get_compiler_info() in 'compat/' we can choose which
relevant information to share per compiler; to get started, let's
demonstrate the version of glibc if the user built with 'gcc'.

Signed-off-by: Emily Shaffer <emilyshaffer@xxxxxxxxxx>
Helped-by: Đoàn Trần Công Danh <congdanhqx@xxxxxxxxx>
Helped-by: Johannes Schindelin <Johannes.Schindelin@xxxxxx>
---
 Documentation/git-bugreport.txt |  1 +
 bugreport.c                     |  6 +++++
 compat/compiler.h               | 41 +++++++++++++++++++++++++++++++++
 3 files changed, 48 insertions(+)
 create mode 100644 compat/compiler.h

diff --git a/Documentation/git-bugreport.txt b/Documentation/git-bugreport.txt
index 17b0d14e8d..643d1b2884 100644
--- a/Documentation/git-bugreport.txt
+++ b/Documentation/git-bugreport.txt
@@ -27,6 +27,7 @@ The following information is captured automatically:
 
  - 'git version --build-options'
  - uname sysname, release, version, and machine strings
+ - Compiler-specific info string
 
 This tool is invoked via the typical Git setup process, which means that in some
 cases, it might not be able to launch - for example, if a relevant config file
diff --git a/bugreport.c b/bugreport.c
index 1a3172bcec..089b939a87 100644
--- a/bugreport.c
+++ b/bugreport.c
@@ -4,6 +4,7 @@
 #include "strbuf.h"
 #include "time.h"
 #include "help.h"
+#include "compat/compiler.h"
 
 static void get_system_info(struct strbuf *sys_info)
 {
@@ -25,6 +26,11 @@ static void get_system_info(struct strbuf *sys_info)
 			    uname_info.release,
 			    uname_info.version,
 			    uname_info.machine);
+
+	strbuf_addstr(sys_info, _("compiler info: "));
+	get_compiler_info(sys_info);
+	strbuf_addstr(sys_info, _("libc info: "));
+	get_libc_info(sys_info);
 }
 
 static const char * const bugreport_usage[] = {
diff --git a/compat/compiler.h b/compat/compiler.h
new file mode 100644
index 0000000000..10dbb65937
--- /dev/null
+++ b/compat/compiler.h
@@ -0,0 +1,41 @@
+#ifndef COMPILER_H
+#define COMPILER_H
+
+#include "git-compat-util.h"
+#include "strbuf.h"
+
+#ifdef __GLIBC__
+#include <gnu/libc-version.h>
+#endif
+
+static inline void get_compiler_info(struct strbuf *info)
+{
+	int len = info->len;
+#ifdef __clang__
+	strbuf_addf(info, "clang: %s\n", __clang_version__);
+#elif defined(__GNUC__)
+	strbuf_addf(info, "gnuc: %d.%d\n", __GNUC__, __GNUC_MINOR__);
+#endif
+
+#ifdef _MSC_VER
+	strbuf_addf(info, "MSVC version: %02d.%02d.%05d\n",
+		    _MSC_VER / 100, _MSC_VER % 100, _MSC_FULL_VER % 100000);
+#endif
+
+	if (len == info->len)
+		strbuf_addstr(info, _("no compiler information available\n"));
+}
+
+static inline void get_libc_info(struct strbuf *info)
+{
+	int len = info->len;
+
+#ifdef __GLIBC__
+	strbuf_addf(info, "glibc: %s\n", gnu_get_libc_version());
+#endif
+
+	if (len == info->len)
+		strbuf_addstr(info, _("no libc information available\n"));
+}
+
+#endif /* COMPILER_H */
-- 
2.26.1.301.g55bc3eb7cb9-goog





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