Turn on warnings when building libap.

For ape, we never enabled warnings in cflags.
Turning it on brings up a lot of warnings. Most are noise,
but a few caught unused variables and trunctaions of pointers.
to smaller integers (int, long).

A few warnings remain.

5 files changed, 6 insertions, 7 deletions

diff --git a/sys/src/ape/lib/ap/posix/getpwent.c b/sys/src/ape/lib/ap/posix/getpwent.c
index 779ae3a54..64d386d4b 100644
--- a/sys/src/ape/lib/ap/posix/getpwent.c
+++ b/sys/src/ape/lib/ap/posix/getpwent.c
@@ -49,7 +49,7 @@ pwdecode(char *p)
 	passwd.pw_dir = p;
 	p = pwskip(p);
 	passwd.pw_shell = p;
-	p = pwskip(p);
+	pwskip(p);
 	return(&passwd);
 }
 
diff --git a/sys/src/ape/lib/ap/posix/mkfifo.c b/sys/src/ape/lib/ap/posix/mkfifo.c
index 7dbc8f5b6..ffd8cb8ea 100644
--- a/sys/src/ape/lib/ap/posix/mkfifo.c
+++ b/sys/src/ape/lib/ap/posix/mkfifo.c
@@ -3,7 +3,7 @@
 #include	<errno.h>
 
 int
-mkfifo(char *path, mode_t mode)
+mkfifo(char *, mode_t)
 {
 #pragma ref path
 #pragma ref mode
diff --git a/sys/src/ape/lib/ap/posix/mkfile b/sys/src/ape/lib/ap/posix/mkfile
index 387208c5e..725694358 100644
--- a/sys/src/ape/lib/ap/posix/mkfile
+++ b/sys/src/ape/lib/ap/posix/mkfile
@@ -14,4 +14,4 @@ OFILES=\
 
 </sys/src/cmd/mksyslib
 
-CFLAGS=-c -D_POSIX_SOURCE
+CFLAGS=$CFLAGS -c -D_POSIX_SOURCE
diff --git a/sys/src/ape/lib/ap/posix/pathconf.c b/sys/src/ape/lib/ap/posix/pathconf.c
index 9fdf47684..c09302d93 100644
--- a/sys/src/ape/lib/ap/posix/pathconf.c
+++ b/sys/src/ape/lib/ap/posix/pathconf.c
@@ -4,7 +4,7 @@
 #include	<sys/limits.h>
 
 long
-pathconf(const char *path, int name)
+pathconf(const char *, int name)
 {
 #pragma ref path
 
@@ -46,10 +46,8 @@ pathconf(const char *path, int name)
 }
 
 long
-fpathconf(int fd, int name)
+fpathconf(int, int name)
 {
-#pragma ref fd
-
 	return pathconf(0, name);
 }
 
diff --git a/sys/src/ape/lib/ap/posix/tzset.c b/sys/src/ape/lib/ap/posix/tzset.c
index f4cbac075..67a367d61 100644
--- a/sys/src/ape/lib/ap/posix/tzset.c
+++ b/sys/src/ape/lib/ap/posix/tzset.c
@@ -20,6 +20,7 @@ tzset(void)
 {
 	char *env, *p, *q;
 	
+	env = NULL;
 	if((p = getenv("timezone")) == 0)
 		goto error;
 	if((env = malloc(strlen(p) + 1)) == 0)