Add skalibs/posixishard.h

 This will break things. It's a known issue. Patches to other
packages will come later, to adapt them to the new API.

 To work around brokenness, there needs to be *two* different
headers:
 1. one to be used before including system headers, that maximizes
visibility by enabling system-dependent feature test macros
(that will be tested by system headers)
 2. one to be used after including system headers, that performs
preprocessor tests and defines.

 skalibs/nonposix.h is the first one.
 Previously, there was no second one, and the tests were scattered
all over. There was a strnlen declaration in skalibs/posixplz.h
(which serves a totally different function: declaring things that
should be in POSIX, but *are not*, i.e. working around problems in
the standard, instead of problems in systems failing to respect
the standard), a build-time sysdep for error.h, #defines for
MSG_NOSIGNAL, etc. etc.
 skalibs/posixishard.h now is the second one, and centralizes
all the tests.

 As a result, the eproto sysdep is unnecessary and has been removed.
skalibs/error.h is now a static header, it is not built anymore.

7 files changed, 18 insertions, 7 deletions

diff --git a/src/libstddjb/cdb_read.c b/src/libstddjb/cdb_read.c
index fa7b1d3..85e8dea 100644
--- a/src/libstddjb/cdb_read.c
+++ b/src/libstddjb/cdb_read.c
@@ -3,7 +3,8 @@
 #include <unistd.h>
 #include <string.h>
 #include <errno.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/allreadwrite.h>
 #include <skalibs/cdb.h>
 
diff --git a/src/libstddjb/ipc_bind.c b/src/libstddjb/ipc_bind.c
index 8686591..b3388d7 100644
--- a/src/libstddjb/ipc_bind.c
+++ b/src/libstddjb/ipc_bind.c
@@ -1,11 +1,13 @@
 /* ISC license. */
 
 #include <skalibs/nonposix.h>
+
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <string.h>
 #include <errno.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/webipc.h>
 
 int ipc_bind (int s, char const *p)
diff --git a/src/libstddjb/ipc_connect.c b/src/libstddjb/ipc_connect.c
index 9aa4dd9..bb0422e 100644
--- a/src/libstddjb/ipc_connect.c
+++ b/src/libstddjb/ipc_connect.c
@@ -1,11 +1,13 @@
 /* ISC license. */
 
 #include <skalibs/nonposix.h>
+
 #include <errno.h>
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <string.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/webipc.h>
 
 int ipc_connect (int s, char const *p)
diff --git a/src/libstddjb/ipc_recv.c b/src/libstddjb/ipc_recv.c
index 5aa1c2b..e15e3c5 100644
--- a/src/libstddjb/ipc_recv.c
+++ b/src/libstddjb/ipc_recv.c
@@ -1,11 +1,13 @@
 /* ISC license. */
 
 #include <skalibs/nonposix.h>
+
 #include <errno.h>
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <string.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/webipc.h>
 
 ssize_t ipc_recv (int fd, char *s, size_t len, char *path)
diff --git a/src/libstddjb/ipc_send.c b/src/libstddjb/ipc_send.c
index 967a64f..65826a6 100644
--- a/src/libstddjb/ipc_send.c
+++ b/src/libstddjb/ipc_send.c
@@ -1,11 +1,13 @@
 /* ISC license. */
 
 #include <skalibs/nonposix.h>
+
 #include <errno.h>
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <string.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/webipc.h>
 
 ssize_t ipc_send (int fd, char const *s, size_t len, char const *path)
diff --git a/src/libstddjb/netstring_get.c b/src/libstddjb/netstring_get.c
index 9756b2e..0dfa907 100644
--- a/src/libstddjb/netstring_get.c
+++ b/src/libstddjb/netstring_get.c
@@ -1,11 +1,12 @@
 /* ISC license. */
 
 #include <errno.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/types.h>
 #include <skalibs/allreadwrite.h>
 #include <skalibs/bytestr.h>
 #include <skalibs/buffer.h>
-#include <skalibs/error.h>
 #include <skalibs/stralloc.h>
 #include <skalibs/netstring.h>
 
diff --git a/src/libstddjb/string_unquote_withdelim.c b/src/libstddjb/string_unquote_withdelim.c
index 3ebd07d..702d3a5 100644
--- a/src/libstddjb/string_unquote_withdelim.c
+++ b/src/libstddjb/string_unquote_withdelim.c
@@ -1,7 +1,8 @@
 /* ISC license. */
 
 #include <errno.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/bytestr.h>
 #include <skalibs/fmtscan.h>
 #include <skalibs/skamisc.h>