autotools: Don't set/override "user variables".

[libserialport.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 2df4865394e76b0e407aa7c76bdac726ee95c3b4..e569ee07f2dd296d8b4aa147929e8055f31efe15 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -24,24 +24,24 @@ AC_PREREQ([2.63])
 # libserialport package version number (NOT the same as shared lib version!).
 m4_define([sp_package_version_major], [0])
 m4_define([sp_package_version_minor], [1])
-m4_define([sp_package_version_micro], [0])
+m4_define([sp_package_version_micro], [1])
 m4_define([sp_package_version], [sp_package_version_major.sp_package_version_minor.sp_package_version_micro])
 
 AC_INIT([libserialport], [sp_package_version], [martin-libserialport@earth.li],
        [libserialport], [http://sigrok.org/wiki/Libserialport])
+AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_MACRO_DIR([autostuff])
 AC_CONFIG_AUX_DIR([autostuff])
 
-AC_CANONICAL_TARGET
+AH_TOP([#ifndef SP_CONFIG_H
+#define SP_CONFIG_H])
+AH_BOTTOM([#endif])
 
 # We require at least automake 1.11 (needed for 'silent rules').
 AM_INIT_AUTOMAKE([1.11 -Wall -Werror check-news])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 
-# Enable more compiler warnings via -Wall and -Wextra.
-CFLAGS="$CFLAGS -Wall -Wextra"
-
 # Checks for programs.
 AC_PROG_CC
 AC_PROG_CPP
@@ -72,52 +72,104 @@ AC_SUBST(SP_LIB_LDFLAGS)
 
 # Checks for libraries.
 
-# This variable collects the pkg-config names of all detected libs.
-# It is then used to construct the "Requires.private:" field in the
-# libserialport.pc file.
-SP_PKGLIBS=""
 SP_LIBS=""
 
-case $target_os in
+case $host_os in
 *linux*)
        AM_CONDITIONAL([LINUX], true)
        AM_CONDITIONAL([WIN32], false)
        AM_CONDITIONAL([MACOSX], false)
+       AM_CONDITIONAL([FREEBSD], false)
        ;;
 *darwin*)
        AM_CONDITIONAL([LINUX], false)
        AM_CONDITIONAL([WIN32], false)
        AM_CONDITIONAL([MACOSX], true)
-       LDFLAGS="$LDFLAGS -Wl,-framework -Wl,IOKit -Wl,-framework -Wl,CoreFoundation"
+       AM_CONDITIONAL([FREEBSD], false)
        AC_CHECK_HEADER(IOKit/IOKitLib.h, [], [AC_MSG_ERROR([IOKit/IOKitLib.h not found])])
        ;;
 mingw* | cygwin*)
        AM_CONDITIONAL([LINUX], false)
        AM_CONDITIONAL([WIN32], true)
        AM_CONDITIONAL([MACOSX], false)
-       SP_LIBS="-lsetupapi -luuid"
+       AM_CONDITIONAL([FREEBSD], false)
+       SP_LIBS="-lsetupapi"
+       ;;
+*freebsd*)
+       AM_CONDITIONAL([LINUX], false)
+       AM_CONDITIONAL([WIN32], false)
+       AM_CONDITIONAL([MACOSX], false)
+       AM_CONDITIONAL([FREEBSD], true)
        ;;
 *)
        AM_CONDITIONAL([LINUX], false)
        AM_CONDITIONAL([WIN32], false)
        AM_CONDITIONAL([MACOSX], false)
-       AC_DEFINE(NO_ENUMERATION)
-       AC_DEFINE(NO_PORT_METADATA)
+       AM_CONDITIONAL([FREEBSD], false)
+       AC_DEFINE(NO_ENUMERATION,,[Enumeration is unsupported])
+       AC_DEFINE(NO_PORT_METADATA,,[Port metadata is unavailable])
 esac
 
-AC_SUBST(SP_PKGLIBS)
 AC_SUBST(SP_LIBS)
 
 # Define size_t if not defined as standard.
 AC_TYPE_SIZE_T
 
 # Check for specific termios structures.
-AC_CHECK_TYPE([struct termios2], [AC_DEFINE(HAVE_TERMIOS2, 1)], [], [[#include <linux/termios.h>]])
-AC_CHECK_TYPE([struct termiox], [AC_DEFINE(HAVE_TERMIOX, 1)], [], [[#include <linux/termios.h>]])
+AC_CHECK_TYPE([struct termios2],
+       [AC_DEFINE(HAVE_TERMIOS2, 1,
+               [struct termios2 is available.])],
+       [], [[#include <linux/termios.h>]])
+AC_CHECK_TYPE([struct termiox],
+       [AC_DEFINE(HAVE_TERMIOX, 1,
+               [struct termiox is available.])],
+       [], [[#include <linux/termios.h>]])
 AC_CHECK_MEMBERS([struct termios.c_ispeed, struct termios.c_ospeed],
-       [AC_DEFINE(HAVE_TERMIOS_SPEED, 1)], [], [[#include <linux/termios.h>]])
+       [AC_DEFINE(HAVE_TERMIOS_SPEED, 1,
+               [struct termios has c_ispeed/c_ospeed.])],
+       [], [[#include <linux/termios.h>]])
 AC_CHECK_MEMBERS([struct termios2.c_ispeed, struct termios2.c_ospeed],
-       [AC_DEFINE(HAVE_TERMIOS2_SPEED, 1)], [], [[#include <linux/termios.h>]])
+       [AC_DEFINE(HAVE_TERMIOS2_SPEED, 1,
+               [struct termios2 has c_ispeed/c_ospeed.])],
+       [], [[#include <linux/termios.h>]])
+
+# Check for the BOTHER definition, needed for setting arbitrary baud rates.
+# We can't just #ifdef BOTHER in the code, because of the separation between
+# code using libc headers and code using kernel termios.h headers.
+AC_MSG_CHECKING(for BOTHER)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <linux/termios.h>
+]],
+[[
+#ifndef BOTHER
+#error BOTHER is not defined
+#endif
+]])],
+[AC_DEFINE(HAVE_BOTHER, 1, [BOTHER macro is available])
+AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])])
+
+# Check for serial_struct.
+AC_CHECK_TYPE([struct serial_struct],
+       [AC_DEFINE(HAVE_SERIAL_STRUCT, 1,
+               [struct serial is available.])],
+        [], [[#include <linux/serial.h>]])
+
+saved="$CFLAGS"; CFLAGS="$CFLAGS -Werror"
+AC_DEFINE(SP_API,,[Macro preceding public API functions])
+AC_DEFINE(SP_PRIV,,[Macro preceding private functions])
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+               __attribute__((visibility("hidden"))) void foo(void) { }
+       ]])],
+       [AC_DEFINE(SP_API, __attribute__((visibility("default"))))]
+       [AC_DEFINE(SP_PRIV, __attribute__((visibility("hidden"))))],
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+               __declspec(dllexport) void foo(void) { }
+       ]])],
+       [AC_DEFINE(SP_API, __declspec(dllexport))]
+       [AC_DEFINE(SP_PRIV,)],
+       [AC_DEFINE(SP_API,)]
+       [AC_DEFINE(SP_PRIV,)]))
+CFLAGS="$saved"
 
 AC_SUBST(MAKEFLAGS, '--no-print-directory')
 AC_SUBST(AM_LIBTOOLFLAGS, '--silent')