-dnl Copyright © 2014-2015, 2018-2019, 2021-2022 Nick Bowler
+dnl Copyright © 2014-2015, 2018-2019, 2021-2024 Nick Bowler
dnl
dnl License WTFPL2: Do What The Fuck You Want To Public License, version 2.
dnl This is free software: you are free to do what the fuck you want to.
exit 1])
AT_CLEANUP
+
+# TEST_FIND_AUTOCONF_VER([to-check], [test-action])
+#
+# For each whitespace-separated version token in to-check, check if we can
+# run program autoconf-VER. The special token 'default' also checks the
+# unversioned autoconf (or, if set in the environment, $AUTOCONF).
+#
+# Then test-action is expanded such that the shell variable $ac refers
+# to the autoconf program, and $acver is the actual version reported by
+# $ac --version. The action should do nothing if the version is acceptable,
+# or "continue" if the version is unacceptable.
+#
+# If an acceptable version is found, the AUTOCONF environment variable is
+# set accordingly. Otherwise, the test group is skipped.
+m4_define([TEST_FIND_AUTOCONF],
+[have_ac=false
+for ac in $1; do
+ AS_CASE([$ac], [default], [ac=${AUTOCONF-autoconf}], [ac=autoconf-$ac])
+ acver=`$ac --version | sed -n '1s/.* //p'`
+ set x $acver; test x"$[#]" = x"2" || continue
+ $2
+ have_ac=:; break
+done
+AT_CHECK([$have_ac || exit 77])
+AUTOCONF=$ac; export AUTOCONF
+AT_CHECK([$AUTOCONF --version], [0], [ignore])
+])
+
+m4_define([TEST_DX_C_FOR_DECLARATIONS],
+[cat "$srcdir/m4/fordecl.m4" >aclocal.m4
+AT_DATA([config.h.in],
+[[#undef HAVE_FOR_DECLS
+]])
+TEST_CONFIGURE_AC([m4_ifnblank([$1], [$1])
+[AC_CONFIG_HEADERS([config.h])
+DX_C_FOR_DECLARATIONS
+]])
+AT_CHECK([$AUTOCONF], [0], [], [stderr])
+AT_DATA([test.c],
+[[#if __STDC_VERSION__ < 199901
+#error nope
+char nope[-1];
+#endif
+char yup;
+]])
+AT_CHECK([$CC -c -std=gnu99 test.c || exit 77], [0], [ignore], [ignore])
+TEST_CONFIGURE([CC="$CC" CFLAGS="-std=gnu89"])
+AT_CHECK([grep HAVE_FOR_DECLS config.h], [0],
+[[/* #undef HAVE_FOR_DECLS */
+]])
+TEST_CONFIGURE([CC="$CC -std=gnu99"])
+AT_CHECK([grep HAVE_FOR_DECLS config.h], [0],
+[[#define HAVE_FOR_DECLS 1
+]])])
+
+AT_SETUP([DX_C_FOR_DECLARATIONS (<autoconf-2.70)])
+AT_KEYWORDS([DX_C_FOR_DECLARATIONS macro])
+TEST_FIND_AUTOCONF([default 2.69 2.68],
+ [AS_VERSION_COMPARE(["$acver"], [2.70], [], [continue], [continue])])
+TEST_DX_C_FOR_DECLARATIONS([[AC_PROG_CC]])
+TEST_DX_C_FOR_DECLARATIONS([[AC_PROG_CC_C99]])
+AT_CLEANUP
+
+AT_SETUP([DX_C_FOR_DECLARATIONS (=autoconf-2.70)])
+AT_KEYWORDS([DX_C_FOR_DECLARATIONS macro])
+TEST_FIND_AUTOCONF([default 2.70],
+ [AS_VERSION_COMPARE(["$acver"], [2.70], [continue], [], [continue])])
+TEST_DX_C_FOR_DECLARATIONS
+AT_CLEANUP
+
+AT_SETUP([DX_C_FOR_DECLARATIONS (>autoconf-2.70)])
+AT_KEYWORDS([DX_C_FOR_DECLARATIONS macro])
+TEST_FIND_AUTOCONF([default 2.71 2.72 2.73 2.74],
+ [AS_VERSION_COMPARE(["$acver"], [2.70], [continue], [continue], [])])
+TEST_DX_C_FOR_DECLARATIONS
+AT_CLEANUP
+
+m4_define([TEST_DX_C_ALIGNOF],
+[cat "$srcdir/m4/align.m4" >aclocal.m4
+AT_DATA([config.h.in],
+[[#undef _Alignof
+#undef _Alignas
+]])
+TEST_CONFIGURE_AC([m4_ifnblank([$1], [$1])
+[AC_CONFIG_HEADERS([config.h])
+DX_C_ALIGNOF
+]])
+AT_CHECK([$AUTOCONF], [0], [], [stderr])
+AT_DATA([test.c],
+[[#if __STDC_VERSION__ < 201112
+#error nope
+char nope[-1];
+#endif
+char yup;
+]])
+AT_CHECK([$CC -c -std=gnu11 -pedantic-errors test.c || exit 77],
+ [0], [ignore], [ignore])
+TEST_CONFIGURE([CC="$CC" CFLAGS="-std=gnu89 -pedantic-errors"])
+AT_CHECK([grep _Align config.h], [0],
+[[#define _Alignof(T) offsetof(struct { char a; T b; }, b)
+/* #undef _Alignas */
+]])
+TEST_CONFIGURE([CC="$CC -std=gnu11"])
+AT_CHECK([grep _Align config.h], [0],
+[[/* #undef _Alignof */
+/* #undef _Alignas */
+]])])
+
+AT_SETUP([DX_C_ALIGNOF (<autoconf-2.70)])
+AT_KEYWORDS([DX_C_ALIGNOF macro])
+TEST_FIND_AUTOCONF([default 2.69 2.68],
+ [AS_VERSION_COMPARE(["$acver"], [2.70], [], [continue], [continue])])
+TEST_DX_C_FOR_DECLARATIONS([[AC_PROG_CC]])
+AT_CLEANUP
+
+AT_SETUP([DX_C_ALIGNOF (=autoconf-2.70)])
+AT_KEYWORDS([DX_C_ALIGNOF macro])
+TEST_FIND_AUTOCONF([default 2.70],
+ [AS_VERSION_COMPARE(["$acver"], [2.70], [continue], [], [continue])])
+TEST_DX_C_ALIGNOF
+AT_CLEANUP
+
+AT_SETUP([DX_C_ALIGNOF (>autoconf-2.70)])
+AT_KEYWORDS([DX_C_ALIGNOF macro])
+TEST_FIND_AUTOCONF([default 2.71 2.72 2.73 2.74],
+ [AS_VERSION_COMPARE(["$acver"], [2.70], [continue], [continue], [])])
+TEST_DX_C_ALIGNOF([[AC_PROG_CC]])
+AT_CLEANUP
+
+m4_define([TEST_DX_C_ALIGNAS],
+[cat "$srcdir/m4/align.m4" >aclocal.m4
+AT_DATA([config.h.in],
+[[#undef _Alignas
+#undef _Alignof
+]])
+TEST_CONFIGURE_AC([m4_ifnblank([$1], [$1])
+[AC_CONFIG_HEADERS([config.h])
+AC_COMPUTE_INT([dummy], [0], [@&t@], [dummy=0]) # ensure main CC probes finish
+AC_ARG_ENABLE([break-cc], [], [CC=false]) # before we force everything to fail
+DX_C_ALIGNAS
+]])
+AT_CHECK([$AUTOCONF], [0], [], [stderr])
+AT_DATA([test.c],
+[[#if __STDC_VERSION__ < 201112
+#error nope
+char nope[-1];
+#endif
+char yup;
+]])
+AT_CHECK([$CC -c -std=gnu11 -pedantic-errors test.c || exit 77],
+ [0], [ignore], [ignore])
+TEST_CONFIGURE([CC="$CC" CFLAGS="-std=gnu89 -pedantic-errors"])
+AT_CHECK([grep _Align config.h], [0],
+[[#define _Alignas(X) __attribute__((__aligned__(X)))
+/* #undef _Alignof */
+]])
+TEST_CONFIGURE([CC="$CC -std=gnu11"])
+AT_CHECK([grep _Align config.h], [0],
+[[/* #undef _Alignas */
+/* #undef _Alignof */
+]])
+TEST_CONFIGURE([CC="$CC" CFLAGS="-std=gnu89 -pedantic-errors" --enable-break-cc])
+AT_CHECK([grep _Align config.h], [0],
+[[#define _Alignas(X) /**/
+/* #undef _Alignof */
+]])])
+
+AT_SETUP([DX_C_ALIGNAS (<autoconf-2.70)])
+AT_KEYWORDS([DX_C_ALIGNAS macro])
+TEST_FIND_AUTOCONF([default 2.69 2.68],
+ [AS_VERSION_COMPARE(["$acver"], [2.70], [], [continue], [continue])])
+TEST_DX_C_ALIGNAS([[AC_PROG_CC]])
+AT_CLEANUP
+
+AT_SETUP([DX_C_ALIGNAS (=autoconf-2.70)])
+AT_KEYWORDS([DX_C_ALIGNAS macro])
+TEST_FIND_AUTOCONF([default 2.70],
+ [AS_VERSION_COMPARE(["$acver"], [2.70], [continue], [], [continue])])
+TEST_DX_C_ALIGNAS
+AT_CLEANUP
+
+AT_SETUP([DX_C_ALIGNAS (>autoconf-2.70)])
+AT_KEYWORDS([DX_C_ALIGNAS macro])
+TEST_FIND_AUTOCONF([default 2.71 2.72 2.73 2.74],
+ [AS_VERSION_COMPARE(["$acver"], [2.70], [continue], [continue], [])])
+TEST_DX_C_ALIGNAS([[AC_PROG_CC]])
+AT_CLEANUP
projects / dxcommon.git / blobdiff