The warning was:
CC rotctl_parse.o
../../hamlib/tests/rotctl_parse.c:1012:50: warning: format string is not a string literal (potentially insecure)
[-Wformat-security]
snprintf(cmd_name, sizeof(cmd_name), parsed_input[0] + 1);
^~~~~~~~~~~~~~~~~~~
../../hamlib/tests/rotctl_parse.c:1012:50: note: treat the string as an argument to avoid this
snprintf(cmd_name, sizeof(cmd_name), parsed_input[0] + 1);
^
"%s",
1 warning generated.
Thw warning was:
CC meade.lo
../../hamlib/meade/meade.c:226:8: warning: using integer absolute value function 'abs' when argument is of floating point type
[-Wabsolute-value]
if(abs(az - priv->target_az) > 5 || abs(el - priv->target_el) > 5)
^
../../hamlib/meade/meade.c:226:8: note: use function 'fabsf' instead
if(abs(az - priv->target_az) > 5 || abs(el - priv->target_el) > 5)
^~~
fabsf
../../hamlib/meade/meade.c:226:41: warning: using integer absolute value function 'abs' when argument is of floating point
type [-Wabsolute-value]
if(abs(az - priv->target_az) > 5 || abs(el - priv->target_el) > 5)
^
../../hamlib/meade/meade.c:226:41: note: use function 'fabsf' instead
if(abs(az - priv->target_az) > 5 || abs(el - priv->target_el) > 5)
^~~
fabsf
2 warnings generated.
The warning was:
CC optoscan.lo
../../hamlib/icom/optoscan.c:738:14: warning: absolute value function 'abs' given an argument of type 'long' but has parameter
of type 'int' which may cause truncation of value [-Wabsolute-value]
usec_diff = abs((state->timer_current.tv_usec) -
^
../../hamlib/icom/optoscan.c:738:14: note: use function 'labs' instead
usec_diff = abs((state->timer_current.tv_usec) -
^~~
labs
1 warning generated.
On Debian Buster gcc ((Debian 8.2.0-8) 8.2.0) was throwing the following
warnings:
CC funcube.lo
../../hamlib/kit/funcube.c: In function ‘funcubepro_get_level’:
../../hamlib/kit/funcube.c:783:87: warning: ‘au8BufOut[3]’ may be used uninitialized in this function [-Wmaybe-uninitialized]
__func__, au8BufOut[0] & 0xFF, au8BufOut[1] & 0xFF, au8BufOut[2] & 0xFF, au8BufOut[3] & 0xFF);
~~~~~~~~~^~~
../../hamlib/kit/funcube.c:783:66: warning: ‘au8BufOut[2]’ may be used uninitialized in this function [-Wmaybe-uninitialized]
__func__, au8BufOut[0] & 0xFF, au8BufOut[1] & 0xFF, au8BufOut[2] & 0xFF, au8BufOut[3] & 0xFF);
~~~~~~~~~^~~
../../hamlib/kit/funcube.c:783:45: warning: ‘au8BufOut[1]’ may be used uninitialized in this function [-Wmaybe-uninitialized]
__func__, au8BufOut[0] & 0xFF, au8BufOut[1] & 0xFF, au8BufOut[2] & 0xFF, au8BufOut[3] & 0xFF);
~~~~~~~~~^~~
../../hamlib/kit/funcube.c: In function ‘funcubepro_set_level’:
../../hamlib/kit/funcube.c:730:87: warning: ‘au8BufOut[3]’ may be used uninitialized in this function [-Wmaybe-uninitialized]
__func__, au8BufOut[0] & 0xFF, au8BufOut[1] & 0xFF, au8BufOut[2] & 0xFF, au8BufOut[3] & 0xFF);
~~~~~~~~~^~~
../../hamlib/kit/funcube.c:730:66: warning: ‘au8BufOut[2]’ may be used uninitialized in this function [-Wmaybe-uninitialized]
__func__, au8BufOut[0] & 0xFF, au8BufOut[1] & 0xFF, au8BufOut[2] & 0xFF, au8BufOut[3] & 0xFF);
~~~~~~~~~^~~
Initialize au8BufOut and au8BufIn to 0 to quell the warning.
On Debian Buster gcc ((Debian 8.2.0-8) 8.2.0) was throwing the following
warning:
CC rigctl.o
../../hamlib/tests/rigctl.c:125:18: warning: ‘have_rl’ defined but not used [-Wunused-const-variable=]
static const int have_rl = 0;
^~~~~~~
and:
CC rotctl.o
../../hamlib/tests/rotctl.c:113:18: warning: ‘have_rl’ defined but not used [-Wunused-const-variable=]
static const int have_rl = 0;
^~~~~~~
Turns out I didn't have the readline-dev package installed. As the have_rl
variable is wrapped in CPP macros, it indeed is not used when readline is not
available.
On Debian Buster gcc ((Debian 8.2.0-8) 8.2.0) was throwing the following
warning:
CC network.lo
../../hamlib/src/network.c: In function ‘network_open’:
../../hamlib/src/network.c:245:46: warning: ‘%s’ directive output may be truncated writing up to 511 bytes into a region of size 139 [-Wformat-truncation=]
snprintf(msg,sizeof(msg),"connect to %s failed, (trying next interface)",rp->pathname);
^~
../../hamlib/src/network.c:245:9: note: ‘snprintf’ output between 44 and 555 bytes into a destination of size 150
snprintf(msg,sizeof(msg),"connect to %s failed, (trying next interface)",rp->pathname);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Raising the size of the msg buffer to 1024 quelled the warning.
On Debian Buster gcc ((Debian 8.2.0-8) 8.2.0) was throwing the following
warning:
CC ft991.lo
../../hamlib/yaesu/ft991.c: In function ‘ft991_set_split_mode’:
../../hamlib/yaesu/ft991.c:336:5: warning: ‘strncat’ output may be truncated copying 128 bytes from a string of length 128 [-Wstringop-truncation]
strncat (restore_commands, priv->ret_data, NEWCAT_DATA_LEN-1);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At least now the warning is gone...
Sebastian Denz