1 # Nathan's Common Config -*- mode:autoconf -*-
2 # Copyright (C) 2020 Nathan Sidwell, nathan@acm.org
5 AC_DEFUN([NMS_NOT_IN_SOURCE],
6 [if test -e configure ; then
7 AC_MSG_ERROR([Do not build in the source tree. Reasons])
10 # thanks to Zack Weinberg for fixing this!
12 [AC_SUBST([tools], [])
14 AS_HELP_STRING([--with-tools=DIR],[tool directory]),
16 [yes], [AC_MSG_ERROR([--with-tools requires an argument])],
18 [tools="${withval%/bin}"])])
20 if test -n "$tools" ; then
21 if test -d "$tools/bin"; then
22 PATH="$tools/bin:$PATH"
23 AC_MSG_NOTICE([Using tools in $tools])
25 AC_MSG_ERROR([tool location does not exist])
29 AC_DEFUN([NMS_TOOL_DIRS],
30 [if test "$tools" && test -d "$tools/include" ; then
31 CXX+=" -I$tools/include"
33 if test "$tools" && test -d "$tools/lib" ; then
35 if os=$(CXX -print-multi-os-directory 2>/dev/null) ; then
38 ## VAR+=... is not dashing
39 LDFLAGS="$LDFLAGS -L $toollib"
43 AC_DEFUN([NMS_NUM_CPUS],
44 [AC_MSG_CHECKING([number of CPUs])
46 [*-*-darwin*], [NUM_CPUS=$(sysctl -n hw.ncpu 2>/dev/null)],
47 [NUM_CPUS=$(grep -c '^processor' /proc/cpuinfo 2>/dev/null)])
48 test "$NUM_CPUS" = 0 && NUM_CPUS=
49 AC_MSG_RESULT([${NUM_CPUS:-unknown}])
50 test "$NUM_CPUS" = 1 && NUM_CPUS=
53 AC_DEFUN([NMS_MAINTAINER_MODE],
54 [AC_ARG_ENABLE([maintainer-mode],
55 AS_HELP_STRING([--enable-maintainer-mode],
56 [enable maintainer mode. Add rules to rebuild configurey bits]),,
57 [enable_maintainer_mode=no])
58 AS_CASE([$enable_maintainer_mode],
59 [yes], [maintainer_mode=yes],
60 [no], [maintainer=no],
61 [AC_MSG_ERROR([unknown maintainer mode $enable_maintainer_mode])])
62 AC_MSG_CHECKING([maintainer-mode])
63 AC_MSG_RESULT([$maintainer_mode])
64 test "$maintainer_mode" = yes && MAINTAINER=yes
65 AC_SUBST(MAINTAINER)])
67 AC_DEFUN([NMS_CXX_COMPILER],
68 [AC_ARG_WITH([compiler],
69 AS_HELP_STRING([--with-compiler=NAME],[which compiler to use]),
70 AC_MSG_CHECKING([C++ compiler])
71 if test "$withval" = "yes" ; then
72 AC_MSG_ERROR([NAME not specified])
73 elif test "$withval" = "no" ; then
74 AC_MSG_ERROR([Gonna need a C++ compiler!])
80 AC_DEFUN([NMS_CXX_11],
81 [AC_MSG_CHECKING([whether $CXX is for C++11])
82 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
83 [#if __cplusplus != 201103
84 #error "C++11 is required"
87 [AC_MSG_RESULT([yes])],
90 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
91 [#if __cplusplus != 201103
92 #error "C++11 is required"
95 AC_MSG_RESULT([adding -std=c++11]),
97 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
98 [#if __cplusplus > 201103
99 #error "C++11 is required"
102 AC_MSG_RESULT([> C++11]),
104 AC_MSG_ERROR([C++11 is required])]))
107 AC_DEFUN([NMS_CXX_20],
108 [AC_MSG_CHECKING([whether $CXX is for C++20])
109 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
110 [#if __cplusplus <= 201703
111 #error "C++20 is required"
114 [AC_MSG_RESULT([yes])],
116 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
117 [#if __cplusplus <= 201703
118 #error "C++20 is required"
121 AC_MSG_RESULT([adding -std=c++20]),
123 AC_MSG_ERROR([C++20 is required])]))
125 AC_MSG_CHECKING([whether C++20 support is sufficiently advanced])
126 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
128 // There doesn't seem to be a feature macro for __VA_OPT__ :(
129 #define VARIADIC(X,...) X __VA_OPT__((__VA_ARGS__))
131 int ary[VARIADIC(X,Y,Z)];
132 #if __cpp_constinit < 201907
133 #error "C++20 constinit required"
134 cpp_constinit is __cpp_constinit
136 #if __cpp_if_constexpr < 201606
137 #error "C++20 constexpr required"
138 cpp_constexpr is __cpp_if_constexpr
140 #if __cpp_concepts < 201907
141 #error "C++20 concepts required"
142 cpp_concepts is __cpp_concepts
144 #if __cpp_structured_bindings < 201606
145 #error "C++20 structured bindings required"
146 cpp_structured_bindings is __cpp_structured_bindings
148 #if __cpp_lib_int_pow2 < 202002
149 #error "std::has_single_bit required"
150 cpp_lib_int_pow2 is __cpp_lib_int_pow2
153 AC_MSG_RESULT([yes 🙂]),
154 AC_MSG_RESULT([no 🙁])
155 AC_MSG_ERROR([C++20 support is too immature]))])
157 AC_DEFUN([NMS_ENABLE_EXCEPTIONS],
158 [AC_ARG_ENABLE([exceptions],
159 AS_HELP_STRING([--enable-exceptions],
160 [enable exceptions & rtti]),,
161 [enable_exceptions="no"])
162 AS_CASE([$enable_exceptions],
163 [yes], [nms_exceptions=yes],
164 [no], [nms_exceptions=no],
165 [AC_MSG_ERROR([unknown exceptions $enable_exceptions])])
166 AC_MSG_CHECKING([exceptions])
167 AC_MSG_RESULT([$nms_exceptions])
168 if test "$nms_exceptions" != no ; then
171 AC_SUBST(EXCEPTIONS)])
173 AC_DEFUN([NMS_LINK_OPT],
174 [AC_MSG_CHECKING([adding $1 to linker])
175 ORIG_LDFLAGS="$LDFLAGS"
176 LDFLAGS="$LDFLAGS $1"
177 AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
178 [AC_MSG_RESULT([ok])],
179 [LDFLAGS="$ORIG_LDFLAGS"
180 AC_MSG_RESULT([no])])
183 AC_DEFUN([NMS_BUGURL],
184 [AC_MSG_CHECKING([bugurl])
186 AS_HELP_STRING([--with-bugurl=URL],[where to report bugs]),
187 AS_CASE(["$withval"],
188 [yes], [AC_MSG_ERROR([--with-bugurl requires an argument])],
190 [BUGURL="${withval}"]),
191 [BUGURL="${PACKAGE_BUGREPORT}"])
192 AC_MSG_RESULT($BUGURL)
193 AC_DEFINE_UNQUOTED(BUGURL,"$BUGURL",[Bug reporting location])])
195 AC_DEFUN([NMS_DISTRIBUTION],
196 [AC_ARG_ENABLE([distribution],
197 AS_HELP_STRING([--enable-distribution],
198 [enable distribution. Inhibit components that prevent distribution]),,
199 [enable_distribution="no"])
200 AS_CASE([$enable_distribution],
201 [yes], [nms_distribution=yes],
202 [no], [nms_distribution=no],
203 [AC_MSG_ERROR([unknown distribution $enable_distribution])])
204 AC_MSG_CHECKING([distribution])
205 AC_MSG_RESULT([$nms_distribution])])
207 AC_DEFUN([NMS_ENABLE_CHECKING],
208 [AC_ARG_ENABLE([checking],
209 AS_HELP_STRING([--enable-checking],
210 [enable run-time checking]),,
211 [enable_checking="yes"])
212 AS_CASE([$enable_checking],
213 [yes|all|yes,*], [nms_checking=yes],
214 [no|none|release], [nms_checking=],
215 [AC_MSG_ERROR([unknown check "$enable_checking"])])
216 AC_MSG_CHECKING([checking])
217 AC_MSG_RESULT([${nms_checking:-no}])
218 if test "$nms_checking" = yes ; then
219 AC_DEFINE_UNQUOTED([NMS_CHECKING], [0${nms_checking:+1}], [Enable checking])
222 AC_DEFUN([NMS_WITH_BINUTILS],
223 [AC_MSG_CHECKING([binutils])
225 AS_HELP_STRING([--with-bfd=DIR], [location of libbfd]),
226 if test "$withval" = "yes" ; then
227 AC_MSG_ERROR([DIR not specified])
228 elif test "$withval" = "no" ; then
229 AC_MSG_RESULT(installed)
231 AC_MSG_RESULT(${withval})
232 CPPFLAGS="$CPPFLAGS -I${withval}/include"
233 LDFLAGS="$LDFLAGS -L${withval}/lib"
235 AC_MSG_RESULT(installed))])
237 AC_DEFUN([NMS_ENABLE_BACKTRACE],
238 [AC_REQUIRE([NMS_DISTRIBUTION])
239 AC_ARG_ENABLE([backtrace],
240 AS_HELP_STRING([--enable-backtrace],[provide backtrace on fatality.]),,
241 [enable_backtrace="maybe"])
242 if test "${enable_backtrace:-maybe}" != no ; then
243 AC_CHECK_HEADERS(execinfo.h)
244 AC_CHECK_FUNCS(backtrace)
245 if test "$nms_distribution" = no ; then
246 AC_DEFINE([HAVE_DECL_BASENAME], [1], [Needed for demangle.h])
247 # libiberty prevents distribution because of licensing
248 AC_CHECK_HEADERS([demangle.h libiberty/demangle.h],[break])
249 # libbfd prevents distribution because of licensing
250 AC_CHECK_HEADERS([bfd.h])
251 AC_SEARCH_LIBS([bfd_openr],[bfd],[LIBS+="-lz -liberty -ldl"],,[-lz -liberty -ldl])
253 if test "$ac_cv_func_backtrace" = yes ; then
255 ldbacktrace=-rdynamic
256 AC_DEFINE([NMS_BACKTRACE], [1], [Enable backtrace])
257 elif test "$enable_backtrace" = yes ; then
258 AC_MSG_ERROR([Backtrace unavailable])
260 AC_SUBST([ldbacktrace])
262 AC_MSG_CHECKING([backtrace])
263 AC_MSG_RESULT([${nms_backtrace:-no}])])
265 AC_DEFUN([NMS_CONFIG_FILES],
266 [CONFIG_FILES="Makefile $1"
268 for generated in config.h.in configure ; do
269 if test $srcdir/configure.ac -nt $srcdir/$generated ; then
270 touch $srcdir/$generated
273 for dir in . $SUBDIRS
275 CONFIG_FILES+=" $dir/Makesub"
276 test -f ${srcdir}/$dir/tests/Makesub.in && CONFIG_FILES+=" $dir/tests/Makesub"
278 AC_CONFIG_FILES([$CONFIG_FILES])
279 AC_SUBST(configure_args,[$ac_configure_args])
281 AC_SUBST(CONFIG_FILES)])