# Checks for programs.
AC_PROG_CC
-AC_PROG_CPP
AC_PROG_CXX
AC_PROG_INSTALL
AC_PROG_LN_S
# These are used to derive the compiler flags and for the "Requires.private"
# field in the generated libsigrok.pc file.
SR_VAR_OPT_PKG([SR_PKGLIBS], [sr_deps_avail])
-SR_PKGLIBS_CHECK=
+SR_PKGLIBS_TESTS=
SR_PKGLIBS_CXX=
SR_PKGLIBS_PYTHON=
######################
# The Check unit testing framework is optional. Disable if not found.
-SR_PKG_CHECK([check], [SR_PKGLIBS_CHECK], [check >= 0.9.4])
+SR_PKG_CHECK([check], [SR_PKGLIBS_TESTS], [check >= 0.9.4])
AM_CONDITIONAL([HAVE_CHECK], [test "x$sr_have_check" = xyes])
AC_LANG([C])
-# Enable the C11 standard if possible, and enforce the use
+# Enable the C99 standard if possible, and enforce the use
# of SR_API to explicitly mark all public API functions.
SR_EXTRA_CFLAGS=
-SR_CHECK_COMPILE_FLAGS([SR_EXTRA_CFLAGS], [C11], [-std=gnu11 -std=c11])
+SR_CHECK_COMPILE_FLAGS([SR_EXTRA_CFLAGS], [C99], [-std=c99 -c99 -AC99 -qlanglvl=extc99])
SR_CHECK_COMPILE_FLAGS([SR_EXTRA_CFLAGS], [visibility], [-fvisibility=hidden])
SR_ARG_ENABLE_WARNINGS([SR_WFLAGS], [-Wall], [-Wall -Wextra -Wmissing-prototypes])
sr_cxx_missing=
# Check if the C++ compiler supports the C++11 standard.
-AX_CXX_COMPILE_STDCXX_11(, [optional])
+AX_CXX_COMPILE_STDCXX_11([noext], [optional])
AS_IF([test "x$HAVE_CXX11" != x1],
[SR_APPEND([sr_cxx_missing], [', '], ['C++11'])])
# Retrieve the compile and link flags for all modules combined.
# Also, bail out at this point if any module dependency is not met.
PKG_CHECK_MODULES([LIBSIGROK], [glib-2.0 >= 2.32.0 $SR_PKGLIBS])
-PKG_CHECK_MODULES([CHECK], [$SR_PKGLIBS_CHECK glib-2.0 $SR_PKGLIBS])
+PKG_CHECK_MODULES([TESTS], [$SR_PKGLIBS_TESTS glib-2.0 $SR_PKGLIBS])
# SR_PKGLIBS_CXX may be empty, so only invoke these checks when
# the C++ bindings are enabled.