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Fix a compiler warning when -Wshadow is used.

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CC       serialport.lo
  In file included from ../serialport.c:25:0:
  ../serialport.c: In function 'get_config':
  ../libserialport_internal.h:227:25: warning: declaration of 'ret' shadows a previous local [-Wshadow]
   #define TRY(x) do { int ret = x; if (ret != SP_OK) RETURN_CODEVAL(ret); } while (0)
                           ^
  ../serialport.c:1566:3: note: in expansion of macro 'TRY'
     TRY(get_baudrate(port->fd, &config->baudrate));
     ^
  ../serialport.c:1543:6: warning: shadowed declaration is here [-Wshadow]
    int ret = get_flow(port->fd, data);
        ^

Also, add -Wshadow to the list of default compiler options.
This commit is contained in:
Uwe Hermann 2015-04-11 21:03:53 +02:00
parent b3e619c8b2
commit 613c48f191
2 changed files with 2 additions and 2 deletions
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2
configure.ac
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@ -39,7 +39,7 @@ m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
# Enable more compiler warnings.
CFLAGS="$CFLAGS -std=c99 -Wall -Wextra -pedantic -Wmissing-prototypes"
CFLAGS="$CFLAGS -std=c99 -Wall -Wextra -pedantic -Wmissing-prototypes -Wshadow"
# Checks for programs.
AC_PROG_CC

2
libserialport_internal.h
View File

@ -224,7 +224,7 @@ extern void (*sp_debug_handler)(const char *format, ...);
#define TRACE(fmt, ...) DEBUG_FMT("%s(" fmt ") called", __func__, __VA_ARGS__)
#define TRACE_VOID() DEBUG_FMT("%s() called", __func__)
#define TRY(x) do { int ret = x; if (ret != SP_OK) RETURN_CODEVAL(ret); } while (0)
#define TRY(x) do { int retval = x; if (retval != SP_OK) RETURN_CODEVAL(retval); } while (0)
SP_PRIV struct sp_port **list_append(struct sp_port **list, const char *portname);