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bug#65319: compilation error on Android (Termux)
From: |
Po Lu |
Subject: |
bug#65319: compilation error on Android (Termux) |
Date: |
Wed, 16 Aug 2023 09:35:59 +0800 |
User-agent: |
Gnus/5.13 (Gnus v5.13) |
Bruno Haible <bruno@clisp.org> writes:
> Hi,
>
> Compiling a current Emacs checkout from today on Android, inside the Termux
> app, produces a compilation error:
>
> ../../src/dired.c:1140:16: warning: call to undeclared function 'getpwent';
> ISO C99 and later do not support implicit function declarations
> [-Wimplicit-function-declaration]
> while ((pw = getpwent ()))
> ^
> ../../src/dired.c:1140:14: error: incompatible integer to pointer conversion
> assigning to 'struct passwd *' from 'int' [-Wint-conversion]
> while ((pw = getpwent ()))
> ^ ~~~~~~~~~~~
>
> The reason is that the default Android API level in Termux is 24,
> the Android <pwd.h> declares getpwent() only starting with API level 26:
>
> #if __ANDROID_API__ >= 26
> struct passwd* getpwent(void) __INTRODUCED_IN(26);
> ...
>
> yet HAVE_GETPWENT and HAVE_ENDPWENT come out as 1.
>
> I can see two possible fixes:
> a) use
> gl_CHECK_FUNCS_ANDROID([getpwent], [[#include <pwd.h>]])
> instead of
> AC_CHECK_FUNCS(... getpwent ...)
> in configure.ac,
> b) add
> AC_CHECK_DECLS([getpwent], [], [], [[
> #include <sys/types.h>
> #include <pwd.h>
> ]])
> to configure.ac, and a '&& HAVE_DECL_GETPWENT' in
> src/dired.c line 1137.
>
> Bruno
Thanks. What does config.guess say in Termux? And are you trying to
build the Android port on Android, or just Emacs itself?
P.S: our bug tracker intercepts all mail and resends individual messages
itself, so you must use the X-Debbugs-Cc header instead of the carbon
copy list when initially opening a bug. If you don't, I get the message
you send to the bug tracker, instead of the message it resends.
Thanks.