include cleanups: remove unused headers and add feature test macros

14 files changed, 5 insertions, 14 deletions

diff --git a/src/signal/raise.c b/src/signal/raise.c
index 6fa43bef..35063c5b 100644
--- a/src/signal/raise.c
+++ b/src/signal/raise.c
@@ -1,5 +1,4 @@
 #include <signal.h>
-#include <errno.h>
 #include <stdint.h>
 #include "syscall.h"
 #include "pthread_impl.h"
diff --git a/src/signal/sigaction.c b/src/signal/sigaction.c
index 5499bd18..f7ff4a61 100644
--- a/src/signal/sigaction.c
+++ b/src/signal/sigaction.c
@@ -1,4 +1,3 @@
-#include <stdlib.h>
 #include <signal.h>
 #include <errno.h>
 #include <string.h>
diff --git a/src/signal/sigfillset.c b/src/signal/sigfillset.c
index 4d0a807a..16e7b4f5 100644
--- a/src/signal/sigfillset.c
+++ b/src/signal/sigfillset.c
@@ -1,5 +1,4 @@
 #include <signal.h>
-#include <string.h>
 #include <limits.h>
 
 int sigfillset(sigset_t *set)
diff --git a/src/signal/sighold.c b/src/signal/sighold.c
index 5b0f6b18..992812fd 100644
--- a/src/signal/sighold.c
+++ b/src/signal/sighold.c
@@ -1,5 +1,5 @@
 #include <signal.h>
-#include <stdlib.h>
+#include <stddef.h>
 
 int sighold(int sig)
 {
diff --git a/src/signal/sigignore.c b/src/signal/sigignore.c
index 98dff61e..78bd7474 100644
--- a/src/signal/sigignore.c
+++ b/src/signal/sigignore.c
@@ -1,5 +1,5 @@
 #include <signal.h>
-#include <stdlib.h>
+#include <stddef.h>
 
 int sigignore(int sig)
 {
diff --git a/src/signal/siginterrupt.c b/src/signal/siginterrupt.c
index 60b34054..94f92be6 100644
--- a/src/signal/siginterrupt.c
+++ b/src/signal/siginterrupt.c
@@ -1,4 +1,4 @@
-#include <stdlib.h>
+#include <stddef.h>
 #include <signal.h>
 
 int siginterrupt(int sig, int flag)
diff --git a/src/signal/sigismember.c b/src/signal/sigismember.c
index dd1a8dbe..ab87d622 100644
--- a/src/signal/sigismember.c
+++ b/src/signal/sigismember.c
@@ -1,5 +1,4 @@
 #include <signal.h>
-#include <errno.h>
 
 int sigismember(const sigset_t *set, int sig)
 {
diff --git a/src/signal/siglongjmp.c b/src/signal/siglongjmp.c
index 2974ff7f..b644cebb 100644
--- a/src/signal/siglongjmp.c
+++ b/src/signal/siglongjmp.c
@@ -1,6 +1,5 @@
 #include <setjmp.h>
 #include <signal.h>
-#include <stdlib.h>
 #include "syscall.h"
 #include "pthread_impl.h"
 
diff --git a/src/signal/signal.c b/src/signal/signal.c
index 9d2f23ab..c0f063ed 100644
--- a/src/signal/signal.c
+++ b/src/signal/signal.c
@@ -1,5 +1,4 @@
 #include <signal.h>
-#include <stddef.h>
 #include "syscall.h"
 #include "libc.h"
 
diff --git a/src/signal/sigpause.c b/src/signal/sigpause.c
index 6c0f05df..363d2fec 100644
--- a/src/signal/sigpause.c
+++ b/src/signal/sigpause.c
@@ -1,5 +1,4 @@
 #include <signal.h>
-#include <stdlib.h>
 
 int sigpause(int sig)
 {
diff --git a/src/signal/sigqueue.c b/src/signal/sigqueue.c
index eb4d184f..b75f0c5c 100644
--- a/src/signal/sigqueue.c
+++ b/src/signal/sigqueue.c
@@ -1,7 +1,6 @@
 #include <signal.h>
 #include <string.h>
 #include <unistd.h>
-#include <stdint.h>
 #include "syscall.h"
 #include "pthread_impl.h"
 
diff --git a/src/signal/sigrelse.c b/src/signal/sigrelse.c
index b0b3024b..31c1a030 100644
--- a/src/signal/sigrelse.c
+++ b/src/signal/sigrelse.c
@@ -1,5 +1,5 @@
 #include <signal.h>
-#include <stdlib.h>
+#include <stddef.h>
 
 int sigrelse(int sig)
 {
diff --git a/src/signal/sigset.c b/src/signal/sigset.c
index 1b6b38fd..cbe46284 100644
--- a/src/signal/sigset.c
+++ b/src/signal/sigset.c
@@ -1,5 +1,5 @@
 #include <signal.h>
-#include <stdlib.h>
+#include <stddef.h>
 
 void (*sigset(int sig, void (*handler)(int)))(int)
 {
diff --git a/src/signal/sigsetjmp.c b/src/signal/sigsetjmp.c
index 6a5f6f15..cb2257f0 100644
--- a/src/signal/sigsetjmp.c
+++ b/src/signal/sigsetjmp.c
@@ -1,6 +1,5 @@
 #include <setjmp.h>
 #include <signal.h>
-#include <stdlib.h>
 
 /* !!! This function will not work unless the compiler performs
  * tail call optimization. Machine-specific asm versions should