Add autotools files

.gitignore

+*~
+*.o

AUTHORS

+Tatsuhiro Tsujikawa <t-tujikawa at users dot sourceforge dot net>

COPYING

+The MIT License
+
+Copyright (c) 2016 ngtcp2 contributors
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Makefile.am

+# ngtcp2
+
+# Copyright (c) 2016 ngtcp2 contributors
+
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+SUBDIRS = lib tests
+
+ACLOCAL_AMFLAGS = -I m4

README

+See README.rst

README.rst

+ngtcp2
+======
+
+ngtcp2 is Not TCP version 2.
+
+License
+-------
+
+The MIT License
+
+Copyright (c) 2016 ngtcp2 contributors

configure.ac

+# ngtcp2
+#
+# Copyright (c) 2016 ngtcp2 contributors
+# Copyright (c) 2012 nghttp2 contributors
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+AC_PREREQ(2.61)
+AC_INIT([ngtcp2], [0.1.0-DEV], [t-tujikawa@users.sourceforge.net])
+AC_CONFIG_AUX_DIR([.])
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_HEADERS([config.h])
+AC_USE_SYSTEM_EXTENSIONS
+
+LT_PREREQ([2.2.6])
+LT_INIT()
+
+AC_CANONICAL_BUILD
+AC_CANONICAL_HOST
+AC_CANONICAL_TARGET
+
+AM_INIT_AUTOMAKE([subdir-objects])
+
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
+# See versioning rule:
+#  http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
+AC_SUBST(LT_CURRENT, 0)
+AC_SUBST(LT_REVISION, 0)
+AC_SUBST(LT_AGE, 0)
+
+# from nghttp2
+major=`echo $PACKAGE_VERSION |cut -d. -f1 | sed -e "s/[^0-9]//g"`
+minor=`echo $PACKAGE_VERSION |cut -d. -f2 | sed -e "s/[^0-9]//g"`
+patch=`echo $PACKAGE_VERSION |cut -d. -f3 | cut -d- -f1 | sed -e "s/[^0-9]//g"`
+
+PACKAGE_VERSION_NUM=`printf "0x%02x%02x%02x" "$major" "$minor" "$patch"`
+
+AC_SUBST(PACKAGE_VERSION_NUM)
+
+# Checks for command-line options from nghttp2
+AC_ARG_ENABLE([werror],
+    [AS_HELP_STRING([--enable-werror],
+                    [Turn on compile time warnings])],
+    [werror=$enableval], [werror=no])
+
+AC_ARG_ENABLE([debug],
+    [AS_HELP_STRING([--enable-debug],
+                    [Turn on debug output])],
+    [debug=$enableval], [debug=no])
+
+# Checks for programs
+AC_PROG_CC
+AC_PROG_INSTALL
+AC_PROG_LN_S
+AC_PROG_MAKE_SET
+AC_PROG_MKDIR_P
+
+PKG_PROG_PKG_CONFIG([0.20])
+
+# Checks for libraries.
+
+# cunit
+PKG_CHECK_MODULES([CUNIT], [cunit >= 2.1], [have_cunit=yes], [have_cunit=no])
+# If pkg-config does not find cunit, check it using AC_CHECK_LIB.  We
+# do this because Debian (Ubuntu) lacks pkg-config file for cunit.
+if test "x${have_cunit}" = "xno"; then
+  AC_MSG_WARN([${CUNIT_PKG_ERRORS}])
+  AC_CHECK_LIB([cunit], [CU_initialize_registry],
+               [have_cunit=yes], [have_cunit=no])
+  if test "x${have_cunit}" = "xyes"; then
+    CUNIT_LIBS="-lcunit"
+    CUNIT_CFLAGS=""
+    AC_SUBST([CUNIT_LIBS])
+    AC_SUBST([CUNIT_CFLAGS])
+  fi
+fi
+if test "x${have_cunit}" = "xyes"; then
+  # cunit in Mac OS X requires ncurses. Note that in Mac OS X, test
+  # program can be built without -lncurses, but it emits runtime
+  # error.
+  case "${build}" in
+    *-apple-darwin*)
+      CUNIT_LIBS="$CUNIT_LIBS -lncurses"
+      AC_SUBST([CUNIT_LIBS])
+      ;;
+  esac
+fi
+
+AM_CONDITIONAL([HAVE_CUNIT], [ test "x${have_cunit}" = "xyes" ])
+
+# Checks for header files.
+AC_CHECK_HEADERS([ \
+  arpa/inet.h \
+  stddef.h \
+  stdint.h \
+  stdlib.h \
+  string.h \
+  unistd.h \
+])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_TYPE_SIZE_T
+AC_TYPE_SSIZE_T
+AC_TYPE_UINT8_T
+AC_TYPE_UINT16_T
+AC_TYPE_UINT32_T
+AC_TYPE_UINT64_T
+AC_TYPE_INT8_T
+AC_TYPE_INT16_T
+AC_TYPE_INT32_T
+AC_TYPE_INT64_T
+AC_TYPE_OFF_T
+AC_TYPE_PID_T
+AC_TYPE_UID_T
+AC_CHECK_TYPES([ptrdiff_t])
+AC_C_BIGENDIAN
+AC_C_INLINE
+AC_SYS_LARGEFILE
+
+# Checks for library functions.
+AC_CHECK_FUNCS([ \
+  memmove \
+  memset \
+])
+
+# More compiler flags from nghttp2.
+save_CFLAGS=$CFLAGS
+
+CFLAGS=
+
+if test "x$werror" != "xno"; then
+    # For C compiler
+    AX_CHECK_COMPILE_FLAG([-Wall], [CFLAGS="$CFLAGS -Wall"])
+    AX_CHECK_COMPILE_FLAG([-Wextra], [CFLAGS="$CFLAGS -Wextra"])
+    AX_CHECK_COMPILE_FLAG([-Werror], [CFLAGS="$CFLAGS -Werror"])
+    AX_CHECK_COMPILE_FLAG([-Wmissing-prototypes], [CFLAGS="$CFLAGS -Wmissing-prototypes"])
+    AX_CHECK_COMPILE_FLAG([-Wstrict-prototypes], [CFLAGS="$CFLAGS -Wstrict-prototypes"])
+    AX_CHECK_COMPILE_FLAG([-Wmissing-declarations], [CFLAGS="$CFLAGS -Wmissing-declarations"])
+    AX_CHECK_COMPILE_FLAG([-Wpointer-arith], [CFLAGS="$CFLAGS -Wpointer-arith"])
+    AX_CHECK_COMPILE_FLAG([-Wdeclaration-after-statement], [CFLAGS="$CFLAGS -Wdeclaration-after-statement"])
+    AX_CHECK_COMPILE_FLAG([-Wformat-security], [CFLAGS="$CFLAGS -Wformat-security"])
+    AX_CHECK_COMPILE_FLAG([-Wwrite-strings], [CFLAGS="$CFLAGS -Wwrite-strings"])
+    AX_CHECK_COMPILE_FLAG([-Wshadow], [CFLAGS="$CFLAGS -Wshadow"])
+    AX_CHECK_COMPILE_FLAG([-Winline], [CFLAGS="$CFLAGS -Winline"])
+    AX_CHECK_COMPILE_FLAG([-Wnested-externs], [CFLAGS="$CFLAGS -Wnested-externs"])
+    AX_CHECK_COMPILE_FLAG([-Wfloat-equal], [CFLAGS="$CFLAGS -Wfloat-equal"])
+    AX_CHECK_COMPILE_FLAG([-Wundef], [CFLAGS="$CFLAGS -Wundef"])
+    AX_CHECK_COMPILE_FLAG([-Wendif-labels], [CFLAGS="$CFLAGS -Wendif-labels"])
+    AX_CHECK_COMPILE_FLAG([-Wempty-body], [CFLAGS="$CFLAGS -Wempty-body"])
+    AX_CHECK_COMPILE_FLAG([-Wcast-align], [CFLAGS="$CFLAGS -Wcast-align"])
+    AX_CHECK_COMPILE_FLAG([-Wclobbered], [CFLAGS="$CFLAGS -Wclobbered"])
+    AX_CHECK_COMPILE_FLAG([-Wvla], [CFLAGS="$CFLAGS -Wvla"])
+    AX_CHECK_COMPILE_FLAG([-Wpragmas], [CFLAGS="$CFLAGS -Wpragmas"])
+    AX_CHECK_COMPILE_FLAG([-Wunreachable-code], [CFLAGS="$CFLAGS -Wunreachable-code"])
+    AX_CHECK_COMPILE_FLAG([-Waddress], [CFLAGS="$CFLAGS -Waddress"])
+    AX_CHECK_COMPILE_FLAG([-Wattributes], [CFLAGS="$CFLAGS -Wattributes"])
+    AX_CHECK_COMPILE_FLAG([-Wdiv-by-zero], [CFLAGS="$CFLAGS -Wdiv-by-zero"])
+    AX_CHECK_COMPILE_FLAG([-Wshorten-64-to-32], [CFLAGS="$CFLAGS -Wshorten-64-to-32"])
+
+    AX_CHECK_COMPILE_FLAG([-Wconversion], [CFLAGS="$CFLAGS -Wconversion"])
+    AX_CHECK_COMPILE_FLAG([-Wextended-offsetof], [CFLAGS="$CFLAGS -Wextended-offsetof"])
+    AX_CHECK_COMPILE_FLAG([-Wformat-nonliteral], [CFLAGS="$CFLAGS -Wformat-nonliteral"])
+    AX_CHECK_COMPILE_FLAG([-Wlanguage-extension-token], [CFLAGS="$CFLAGS -Wlanguage-extension-token"])
+    AX_CHECK_COMPILE_FLAG([-Wmissing-field-initializers], [CFLAGS="$CFLAGS -Wmissing-field-initializers"])
+    AX_CHECK_COMPILE_FLAG([-Wmissing-noreturn], [CFLAGS="$CFLAGS -Wmissing-noreturn"])
+    AX_CHECK_COMPILE_FLAG([-Wmissing-variable-declarations], [CFLAGS="$CFLAGS -Wmissing-variable-declarations"])
+    # Not used because we cannot change public structs
+    # AX_CHECK_COMPILE_FLAG([-Wpadded], [CFLAGS="$CFLAGS -Wpadded"])
+    AX_CHECK_COMPILE_FLAG([-Wsign-conversion], [CFLAGS="$CFLAGS -Wsign-conversion"])
+    # Not used because this basically disallows default case
+    # AX_CHECK_COMPILE_FLAG([-Wswitch-enum], [CFLAGS="$CFLAGS -Wswitch-enum"])
+    AX_CHECK_COMPILE_FLAG([-Wunreachable-code-break], [CFLAGS="$CFLAGS -Wunreachable-code-break"])
+    AX_CHECK_COMPILE_FLAG([-Wunused-macros], [CFLAGS="$CFLAGS -Wunused-macros"])
+    AX_CHECK_COMPILE_FLAG([-Wunused-parameter], [CFLAGS="$CFLAGS -Wunused-parameter"])
+    AX_CHECK_COMPILE_FLAG([-Wredundant-decls], [CFLAGS="$CFLAGS -Wredundant-decls"])
+    # Only work with Clang for the moment
+    AX_CHECK_COMPILE_FLAG([-Wheader-guard], [CFLAGS="$CFLAGS -Wheader-guard"])
+    AX_CHECK_COMPILE_FLAG([-Wsometimes-uninitialized], [CFLAGS="$CFLAGS -Wsometimes-uninitialized"])
+
+    # This is required because we pass format string as "const char*.
+    AX_CHECK_COMPILE_FLAG([-Wno-format-nonliteral], [CFLAGS="$CFLAGS -Wno-format-nonliteral"])
+fi
+
+WARNCFLAGS=$CFLAGS
+
+CFLAGS=$save_CFLAGS
+
+AC_SUBST([WARNCFLAGS])
+
+# extra flags for API function visibility
+EXTRACFLAG=
+AX_CHECK_COMPILE_FLAG([-fvisibility=hidden], [EXTRACFLAG="-fvisibility=hidden"])
+
+AC_SUBST([EXTRACFLAG])
+
+# debug build
+if test "x$debug" != "xno"; then
+    AC_DEFINE([DEBUGBUILD], [1], [Define to 1 to enable debug output.])
+fi
+
+AC_CONFIG_FILES([
+  Makefile
+  lib/Makefile
+  lib/libngtcp2.pc
+  lib/includes/Makefile
+  lib/includes/ngtcp2/version.h
+  tests/Makefile
+])
+AC_OUTPUT
+
+AC_MSG_NOTICE([summary of build options:
+
+    Package version: ${VERSION}
+    Library version: $LT_CURRENT:$LT_REVISION:$LT_AGE
+    Install prefix:  ${prefix}
+    System types:
+      Build:         ${build}
+      Host:          ${host}
+      Target:        ${target}
+    Compiler:
+      C compiler:     ${CC}
+      CFLAGS:         ${CFLAGS}
+      LDFLAGS:        ${LDFLAGS}
+      C preprocessor: ${CPP}
+      CPPFLAGS:       ${CPPFLAGS}
+      WARNCFLAGS:     ${WARNCFLAGS}
+      EXTRACFLAG:     ${EXTRACFLAG}
+      LIBS:           ${LIBS}
+    Library:
+      Shared:         ${enable_shared}
+      Static:         ${enable_static}
+    Test:
+      CUnit:          ${have_cunit} (CFLAGS='${CUNIT_CFLAGS}' LIBS='${CUNIT_LIBS}')
+    Debug:
+      Debug:          ${debug}
+])

lib/Makefile.am

+# ngtcp2
+
+# Copyright (c) 2016 ngtcp2
+
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+SUBDIRS = includes
+
+AM_CFLAGS = $(WARNCFLAGS) $(EXTRACFLAG)
+AM_CPPFLAGS = -I$(srcdir)/includes -I$(builddir)/includes
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = libngtcp2.pc
+DISTCLEANFILES = $(pkgconfig_DATA)
+
+lib_LTLIBRARIES = libngtcp2.la
+
+OBJECTS =
+HFILES =
+
+libngtcp2_la_SOURCES = $(HFILES) $(OBJECTS)
+libngtcp2_la_LDFLAGS = -no-undefined \
+	-version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE)

lib/includes/Makefile.am

+# ngtcp2
+
+# Copyright (c) 2016 ngtcp2 contributors
+
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

lib/includes/ngtcp2/version.h.in

+/*
+ * ngtcp2
+ *
+ * Copyright (c) 2016 ngtcp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef VERSION_H
+#define VERSION_H
+
+/**
+ * @macro
+ *
+ * Version number of the ngtcp2 library release.
+ */
+#define NGTCP2_VERSION "@PACKAGE_VERSION@"
+
+/**
+ * @macro
+ *
+ * Numerical representation of the version number of the ngtcp2
+ * library release. This is a 24 bit number with 8 bits for major
+ * number, 8 bits for minor and 8 bits for patch. Version 1.2.3
+ * becomes 0x010203.
+ */
+#define NGTCP2_VERSION_NUM @PACKAGE_VERSION_NUM@
+
+#endif /* VERSION_H */

lib/libngtcp2.pc.in

+# ngtcp2
+
+# Copyright (c) 2016 ngtcp2 contributors
+
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libngtcp2
+Description: ngtcp2 library
+URL: https://github.com/ngtcp2/ngtcp2
+Version: @VERSION@
+Libs: -L${libdir} -lngtcp2
+Cflags: -I${includedir}

m4/ax_check_compile_flag.m4

+# ===========================================================================
+#   http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
+#
+# DESCRIPTION
+#
+#   Check whether the given FLAG works with the current language's compiler
+#   or gives an error.  (Warnings, however, are ignored)
+#
+#   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
+#   success/failure.
+#
+#   If EXTRA-FLAGS is defined, it is added to the current language's default
+#   flags (e.g. CFLAGS) when the check is done.  The check is thus made with
+#   the flags: "CFLAGS EXTRA-FLAGS FLAG".  This can for example be used to
+#   force the compiler to issue an error when a bad flag is given.
+#
+#   INPUT gives an alternative input source to AC_COMPILE_IFELSE.
+#
+#   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
+#   macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 4
+
+AC_DEFUN([AX_CHECK_COMPILE_FLAG],
+[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
+AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
+AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
+  ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
+  _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
+  AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
+    [AS_VAR_SET(CACHEVAR,[yes])],
+    [AS_VAR_SET(CACHEVAR,[no])])
+  _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
+AS_VAR_IF(CACHEVAR,yes,
+  [m4_default([$2], :)],
+  [m4_default([$3], :)])
+AS_VAR_POPDEF([CACHEVAR])dnl
+])dnl AX_CHECK_COMPILE_FLAGS

tests/Makefile.am

+# ngtcp2
+
+# Copyright (c) 2016 ngtcp2 contributors
+
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+if HAVE_CUNIT
+
+endif # HAVE_CUNIT