2015-09-15 06:26:51 +08:00
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From d667b13a87cf3207599a19eb981a893a1d7a67ee Mon Sep 17 00:00:00 2001
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From: Brendan Heading <brendanheading@gmail.com>
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Date: Mon, 14 Sep 2015 23:25:52 +0100
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2021-11-22 01:07:55 +08:00
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Subject: [PATCH] ibrcommon/data/File.cpp: support POSIX basename call
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2015-09-15 06:26:51 +08:00
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Firstly, and somewhat strangely, musl chooses not to provide a basename(3)
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prototype within <string.h> whenever __cplusplus is defined. This can be
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solved by including the <libgen.h> header defined by POSIX 1003.1 whenever
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__GLIBC__ is not defined.
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However, this leads to a second problem. POSIX defines the function as
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char* basename(char*) and this is the only version supported by musl.
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However, the std::string.cstr() method returns a const char*.
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POSIX says that the string parameter can be modified. However the GNU
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implementation never modifies it. glibc therefore supports an extension
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when compiling under C++ by also supplying
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const char* basename(const char*). This extension is not present on musl
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which is the cause of the failure.
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The solution is reasonably straightforward; test if __GLIBC__ is defined
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before calling basename. If not, use the fallback already provided for
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other platforms whereby basename() is called on a temporary copy.
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Signed-off-by: Brendan Heading <brendanheading@gmail.com>
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Upstream-status: pending
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---
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ibrcommon/data/File.cpp | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/ibrcommon/data/File.cpp b/ibrcommon/data/File.cpp
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index 31af4ae..68e9b4f 100644
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--- a/ibrcommon/data/File.cpp
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+++ b/ibrcommon/data/File.cpp
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@@ -35,7 +35,7 @@
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#include <cerrno>
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#include <fstream>
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-#if !defined(HAVE_FEATURES_H) || defined(ANDROID)
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+#if !defined(HAVE_FEATURES_H) || !defined(__GLIBC__) || defined(ANDROID)
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#include <libgen.h>
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#endif
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@@ -225,7 +225,7 @@ namespace ibrcommon
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std::string File::getBasename() const
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{
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-#if !defined(ANDROID) && defined(HAVE_FEATURES_H)
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+#if !defined(ANDROID) && defined(HAVE_FEATURES_H) && defined(__GLIBC__)
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return std::string(basename(_path.c_str()));
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#else
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char path[_path.length()+1];
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--
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2.4.3
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