X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=configure.ac;h=f283ca00560960cb20389fcfff24f715c0fa8f24;hb=91ef511db2370904f8765a13e315fbddaf5ffe07;hp=f7b2e48909967dbbf8265af227b7e3135fc42c43;hpb=0ab8386a5c0b6fa58ce2a8c3aa2ca337bcb49005;p=libsigrok.git

diff --git a/configure.ac b/configure.ac
index f7b2e489..f283ca00 100644
--- a/configure.ac
+++ b/configure.ac
@@ -39,7 +39,6 @@ AH_BOTTOM([#endif /* SR_CONFIG_H */])
 
 # Checks for programs.
 AC_PROG_CC
-AC_PROG_CPP
 AC_PROG_CXX
 AC_PROG_INSTALL
 AC_PROG_LN_S
@@ -107,10 +106,10 @@ AM_CONDITIONAL([HAVE_CHECK], [test "x$sr_have_check" = xyes])
 
 AC_LANG([C])
 
-# Enable the C11 standard if possible, and enforce the use
+# Enable the C99 standard if possible, and enforce the use
 # of SR_API to explicitly mark all public API functions.
 SR_EXTRA_CFLAGS=
-SR_CHECK_COMPILE_FLAGS([SR_EXTRA_CFLAGS], [C11], [-std=gnu11 -std=c11])
+SR_CHECK_COMPILE_FLAGS([SR_EXTRA_CFLAGS], [C99], [-std=c99 -c99 -AC99 -qlanglvl=extc99])
 SR_CHECK_COMPILE_FLAGS([SR_EXTRA_CFLAGS], [visibility], [-fvisibility=hidden])
 
 SR_ARG_ENABLE_WARNINGS([SR_WFLAGS], [-Wall], [-Wall -Wextra -Wmissing-prototypes])
@@ -122,6 +121,12 @@ AC_CHECK_HEADERS([sys/mman.h], [SR_APPEND([sr_deps_avail], [sys_mman_h])])
 AC_CHECK_HEADERS([sys/ioctl.h], [SR_APPEND([sr_deps_avail], [sys_ioctl_h])])
 AC_CHECK_HEADERS([sys/timerfd.h], [SR_APPEND([sr_deps_avail], [sys_timerfd_h])])
 
+# We need to link against the Winsock2 library for SCPI over TCP.
+AS_CASE([$host], [*-mingw*], [SR_EXTRA_LIBS='-lws2_32'], [SR_EXTRA_LIBS=])
+
+# libm (the standard math library) is always needed.
+SR_SEARCH_LIBS([SR_EXTRA_LIBS], [pow], [m])
+
 # RPC is only needed for VXI support.
 AC_CACHE_CHECK([for RPC support], [sr_cv_have_rpc],
 	[AC_LINK_IFELSE([AC_LANG_PROGRAM(
@@ -149,6 +154,7 @@ sr_check_driver_deps() {
 		AS_CASE([" $sr_deps_avail "], [*" $sr_dep "*],,
 			[SR_APPEND([sr_deps_missing], [', '], [$sr_dep])])
 	done
+	test -z "$sr_deps_missing" || return 1
 }
 
 AC_ARG_ENABLE([all-drivers],
@@ -163,9 +169,8 @@ m4_define([_SR_DRIVER], [
 		[$3=$enableval], [$3=$enable_all_drivers])
 
 	AS_IF([test "x[$]$3" = xyes], [sr_hw_info=yes[]m4_ifval([$4], [
-		sr_check_driver_deps $4
-		AS_IF([test -n "$sr_deps_missing"],
-			[$3=no sr_hw_info="no (missing: $sr_deps_missing)"])
+		sr_check_driver_deps $4 \
+			|| $3=no sr_hw_info="no (missing: $sr_deps_missing)"
 	])], [sr_hw_info='no (disabled)'])
 	sr_driver_summary_append "$2" "$sr_hw_info"
 
@@ -252,9 +257,7 @@ AC_ARG_ENABLE([java],
 sr_cxx_missing=
 
 # Check if the C++ compiler supports the C++11 standard.
-m4_ifdef([AX_CXX_COMPILE_STDCXX_11],
-	[AX_CXX_COMPILE_STDCXX_11(, [optional])],
-	[m4_warn([unsupported], [Missing macro AX_CXX_COMPILE_STDCXX_11: no C++11 check possible])])
+AX_CXX_COMPILE_STDCXX_11([noext], [optional])
 AS_IF([test "x$HAVE_CXX11" != x1],
 	[SR_APPEND([sr_cxx_missing], [', '], ['C++11'])])
 
@@ -408,18 +411,6 @@ AC_DEFINE_UNQUOTED([CONF_LIBZIP_VERSION], ["$sr_libzip_version"],
 AC_DEFINE_UNQUOTED([CONF_HOST], ["$host"],
 	[The canonical host libsigrok will run on.])
 
-AC_LANG([C])
-
-# libm (the standard math library) is always needed.
-AC_SEARCH_LIBS([pow], [m])
-
-# We need to link against the Winsock2 library for SCPI over TCP.
-AS_CASE([$host], [*mingw*], [LIBS="$LIBS -lws2_32"])
-
-AC_SUBST([FIRMWARE_DIR], ['$(datadir)/sigrok-firmware'])
-AC_SUBST([MAKEFLAGS], ['--no-print-directory'])
-AC_SUBST([AM_LIBTOOLFLAGS], ['--silent'])
-
 AC_CONFIG_FILES([Makefile libsigrok.pc bindings/cxx/libsigrokcxx.pc])
 
 AC_OUTPUT