2 AC_INIT([libsodium],[1.0.10],
3 [https://github.com/jedisct1/libsodium/issues],
5 [https://github.com/jedisct1/libsodium])
6 AC_CONFIG_AUX_DIR([build-aux])
7 AC_CONFIG_MACRO_DIR([m4])
8 AC_CONFIG_SRCDIR([src/libsodium/sodium/version.c])
10 AM_INIT_AUTOMAKE([1.11 dist-bzip2 tar-ustar foreign subdir-objects])
11 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
16 ISODATE=`date +%Y-%m-%d`
19 SODIUM_LIBRARY_VERSION_MAJOR=9
20 SODIUM_LIBRARY_VERSION_MINOR=2
22 SODIUM_LIBRARY_VERSION=19:0:1
26 # current:revision:age
28 # | | +- increment if interfaces have been added
29 # | | set to zero if interfaces have been removed
31 # | +- increment if source code has changed
32 # | set to zero if current is incremented
33 # +- increment if interfaces have been added, removed or changed
34 AC_SUBST(SODIUM_LIBRARY_VERSION_MAJOR)
35 AC_SUBST(SODIUM_LIBRARY_VERSION_MINOR)
36 AC_SUBST(SODIUM_LIBRARY_VERSION)
39 LX_CFLAGS=${CFLAGS-NONE}
43 AS_IF([test pwd | fgrep ' ' > /dev/null 2>&1],
44 [AC_MSG_WARN([The build directory contains whitespaces - This can cause tests/installation to fail due to limitations of some libtool versions])]
50 [AS_HELP_STRING(--disable-ssp,Do not compile with -fstack-protector)],
52 AS_IF([test "x$enableval" = "xno"], [
63 [AS_HELP_STRING(--disable-asm,Disable assembly implementations)],
65 AS_IF([test "x$enableval" = "xno"], [
75 AS_IF([test "x$EMSCRIPTEN" != "x"],[
77 AC_MSG_WARN([compiling to javascript - asm implementations disabled])
81 [AS_HELP_STRING(--disable-pie,Do not produce position independent executables)],
82 enable_pie=$enableval, enable_pie="maybe")
84 AS_CASE([$host_os], [mingw*|cygwin*|msys], [enable_pie="no"])
86 AC_ARG_ENABLE(blocking-random,
87 [AS_HELP_STRING(--enable-blocking-random,Enable this switch only if /dev/urandom is totally broken on the target platform)],
89 AS_IF([test "x$enableval" = "xyes"], [
90 AC_DEFINE([USE_BLOCKING_RANDOM], [1], [/dev/urandom is insecure on the target platform])
94 AC_ARG_ENABLE(minimal,
95 [AS_HELP_STRING(--enable-minimal,
96 [Only compile the minimum set of functions required for the high-level API])],
98 AS_IF([test "x$enableval" = "xyes"], [
107 AM_CONDITIONAL([MINIMAL], [test x$enable_minimal = xyes])
109 AC_ARG_WITH(safecode,
110 [AS_HELP_STRING(--with-safecode,For maintainers only - please do not use)],
111 [AS_IF([test "x$withval" = "xyes"], [
112 AC_ARG_VAR([SAFECODE_HOME], [set to the safecode base directory])
113 : ${SAFECODE_HOME:=/opt/safecode}
114 LDFLAGS="$LDFLAGS -L${SAFECODE_HOME}/lib"
115 LIBS="$LIBS -lsc_dbg_rt -lpoolalloc_bitmap -lstdc++"
116 CFLAGS="$CFLAGS -fmemsafety"
121 [AS_HELP_STRING(--enable-debug,For maintainers only - please do not use)],
123 AS_IF([test "x$enableval" = "xyes"], [
124 AS_IF([test "x$LX_CFLAGS" = "xNONE"], [
126 for flag in `echo $CFLAGS`; do
130 [*], [AS_VAR_APPEND([nxflags], [" $flag"])])
132 CFLAGS="$nxflags -O0 -g3"
134 CPPFLAGS="$CPPFLAGS -DDEBUG=1"
139 [AS_HELP_STRING(--enable-opt,Optimize for the native CPU - The resulting library will be faster but not portable)],
141 AS_IF([test "x$enableval" = "xyes"], [
142 CFLAGS="$CFLAGS -O3 -march=native"
143 LDFLAGS="$LDFLAGS -O3 -march=native"])
154 AC_USE_SYSTEM_EXTENSIONS
156 AC_CHECK_DEFINE([__native_client__], [NATIVECLIENT="yes"], [])
158 AC_CHECK_DEFINE([_FORTIFY_SOURCE], [], [
159 AX_CHECK_COMPILE_FLAG([-D_FORTIFY_SOURCE=2],
160 [CPPFLAGS="$CPPFLAGS -D_FORTIFY_SOURCE=2"])
163 AX_CHECK_COMPILE_FLAG([-fvisibility=hidden],
164 [CFLAGS="$CFLAGS -fvisibility=hidden"])
166 AS_CASE([$host_os], [cygwin*|mingw*|msys|pw32*|cegcc*], [ ], [
167 AX_CHECK_COMPILE_FLAG([-fPIC], [
168 AX_CHECK_LINK_FLAG([-fPIC],
169 [CFLAGS="$CFLAGS -fPIC"]
174 AS_IF([test "$enable_pie" != "no"],[
175 AX_CHECK_COMPILE_FLAG([-fPIE], [
176 AX_CHECK_LINK_FLAG([-fPIE],
177 [AX_CHECK_LINK_FLAG([-pie],
178 [CFLAGS="$CFLAGS -fPIE"
179 LDFLAGS="$LDFLAGS -pie"])
184 AX_CHECK_COMPILE_FLAG([-fno-strict-aliasing], [CFLAGS="$CFLAGS -fno-strict-aliasing"])
185 AX_CHECK_COMPILE_FLAG([-fno-strict-overflow], [CFLAGS="$CFLAGS -fno-strict-overflow"], [
186 AX_CHECK_COMPILE_FLAG([-fwrapv], [CFLAGS="$CFLAGS -fwrapv"])
189 AS_IF([test "$GCC" = "yes" ], [
191 [i?86|amd64|x86_64], [
194 #if !defined(__clang__) && defined(__GNUC__) && ((__GNUC__ << 8) | __GNUC_MINOR__) < 0x403
197 int main(void) { return 0; }
199 AX_CHECK_COMPILE_FLAG([-flax-vector-conversions], [CFLAGS="$CFLAGS -flax-vector-conversions"])
205 LIBTOOL_OLD_FLAGS="$LIBTOOL_EXTRA_FLAGS"
206 LIBTOOL_EXTRA_FLAGS="$LIBTOOL_EXTRA_FLAGS -version-info $SODIUM_LIBRARY_VERSION"
207 AC_ARG_ENABLE(soname-versions,
208 [AC_HELP_STRING([--enable-soname-versions], [enable soname versions (must be disabled for Android) (default: enabled)])],
210 AS_IF([test "x$enableval" = "xno"], [
211 LIBTOOL_EXTRA_FLAGS="$LIBTOOL_OLD_FLAGS -avoid-version"
217 [cygwin*|mingw*|msys|pw32*|cegcc*], [
218 AX_CHECK_LINK_FLAG([-Wl,--dynamicbase], [LDFLAGS="$LDFLAGS -Wl,--dynamicbase"])
219 AX_CHECK_LINK_FLAG([-Wl,--high-entropy-va], [LDFLAGS="$LDFLAGS -Wl,--high-entropy-va"])
220 AX_CHECK_LINK_FLAG([-Wl,--nxcompat], [LDFLAGS="$LDFLAGS -Wl,--nxcompat"])
223 AS_IF([test "x$enable_ssp" != "xno"],[
226 [cygwin*|mingw*|msys|pw32*|cegcc*], [ ],
228 AX_CHECK_COMPILE_FLAG([-fstack-protector], [
229 AX_CHECK_LINK_FLAG([-fstack-protector],
230 [CFLAGS="$CFLAGS -fstack-protector"]
236 AX_CHECK_COMPILE_FLAG([-Wwrite-strings], [CFLAGS="$CFLAGS -Wwrite-strings"])
237 AX_CHECK_COMPILE_FLAG([-Wdiv-by-zero], [CFLAGS="$CFLAGS -Wdiv-by-zero"])
238 AX_CHECK_COMPILE_FLAG([-Wsometimes-uninitialized], [CFLAGS="$CFLAGS -Wsometimes-uninitialized"])
240 AC_ARG_VAR([CWFLAGS], [define to compilation flags for generating extra warnings])
242 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wall], [CWFLAGS="$CWFLAGS -Wall"])
243 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wextra], [CWFLAGS="$CWFLAGS -Wextra"])
245 AC_MSG_CHECKING(for clang)
246 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
252 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wno-unknown-warning-option],
253 [CWFLAGS="$CWFLAGS -Wno-unknown-warning-option"])
258 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wbad-function-cast], [CWFLAGS="$CWFLAGS -Wbad-function-cast"])
259 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wcast-align], [CWFLAGS="$CWFLAGS -Wcast-align"])
260 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wcast-qual], [CWFLAGS="$CWFLAGS -Wcast-qual"])
261 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wduplicated-cond], [CWFLAGS="$CWFLAGS -Wduplicated-cond"])
262 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wfloat-equal], [CWFLAGS="$CWFLAGS -Wfloat-equal"])
263 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wformat=2], [CWFLAGS="$CWFLAGS -Wformat=2"])
264 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wmissing-declarations], [CWFLAGS="$CWFLAGS -Wmissing-declarations"])
265 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wmissing-prototypes], [CWFLAGS="$CWFLAGS -Wmissing-prototypes"])
266 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wnested-externs], [CWFLAGS="$CWFLAGS -Wnested-externs"])
267 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wno-unknown-pragmas], [CWFLAGS="$CWFLAGS -Wno-unknown-pragmas"])
268 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wnormalized=id], [CWFLAGS="$CWFLAGS -Wnormalized=id"])
269 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wnull-dereference], [CWFLAGS="$CWFLAGS -Wnull-dereference"])
270 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wpointer-arith], [CWFLAGS="$CWFLAGS -Wpointer-arith"])
271 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wredundant-decls], [CWFLAGS="$CWFLAGS -Wredundant-decls"])
272 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wstrict-prototypes], [CWFLAGS="$CWFLAGS -Wstrict-prototypes"])
273 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wswitch-enum], [CWFLAGS="$CWFLAGS -Wswitch-enum"])
274 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wvariable-decl], [CWFLAGS="$CWFLAGS -Wvariable-decl"])
276 AX_CHECK_LINK_FLAG([-Wl,-z,relro], [LDFLAGS="$LDFLAGS -Wl,-z,relro"])
277 AX_CHECK_LINK_FLAG([-Wl,-z,now], [LDFLAGS="$LDFLAGS -Wl,-z,now"])
278 AX_CHECK_LINK_FLAG([-Wl,-z,noexecstack], [LDFLAGS="$LDFLAGS -Wl,-z,noexecstack"])
281 AC_SUBST(LIBTOOL_DEPS)
283 AC_ARG_VAR([AR], [path to the ar utility])
284 AC_CHECK_TOOL([AR], [ar], [ar])
286 dnl Checks for headers
288 AS_IF([test "x$EMSCRIPTEN" = "x"],[
290 AC_MSG_CHECKING(for MMX instructions set)
292 AX_CHECK_COMPILE_FLAG([-mmmx], [CFLAGS="$CFLAGS -mmmx"])
293 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
294 #pragma GCC target("mmx")
295 #include <mmintrin.h>
296 ]], [[ __m64 x = _mm_setzero_si64(); ]])],
298 AC_DEFINE([HAVE_MMINTRIN_H], [1], [mmx is available])
299 AX_CHECK_COMPILE_FLAG([-mmmx], [CFLAGS_MMX="-mmmx"])],
303 AC_MSG_CHECKING(for SSE2 instructions set)
305 AX_CHECK_COMPILE_FLAG([-msse2], [CFLAGS="$CFLAGS -msse2"])
306 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
307 #pragma GCC target("sse2")
311 #include <emmintrin.h>
312 ]], [[ __m128d x = _mm_setzero_pd();
313 __m128i y = _mm_srli_epi64(_mm_setzero_si128(), 26); ]])],
315 AC_DEFINE([HAVE_EMMINTRIN_H], [1], [sse2 is available])
316 AX_CHECK_COMPILE_FLAG([-msse2], [CFLAGS_SSE2="-msse2"])],
321 AX_CHECK_COMPILE_FLAG([-msse3], [CFLAGS="$CFLAGS -msse3"])
322 AC_MSG_CHECKING(for SSE3 instructions set)
323 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
324 #pragma GCC target("sse3")
325 #include <pmmintrin.h>
326 ]], [[ __m128 x = _mm_addsub_ps(_mm_cvtpd_ps(_mm_setzero_pd()),
327 _mm_cvtpd_ps(_mm_setzero_pd())); ]])],
329 AC_DEFINE([HAVE_PMMINTRIN_H], [1], [sse3 is available])
330 AX_CHECK_COMPILE_FLAG([-msse3], [CFLAGS_SSE3="-msse3"])],
335 AX_CHECK_COMPILE_FLAG([-mssse3], [CFLAGS="$CFLAGS -mssse3"])
336 AC_MSG_CHECKING(for SSSE3 instructions set)
337 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
338 #pragma GCC target("ssse3")
339 #include <tmmintrin.h>
340 ]], [[ __m64 x = _mm_abs_pi32(_m_from_int(0)); ]])],
342 AC_DEFINE([HAVE_TMMINTRIN_H], [1], [ssse3 is available])
343 AX_CHECK_COMPILE_FLAG([-mssse3], [CFLAGS_SSSE3="-mssse3"])],
348 AX_CHECK_COMPILE_FLAG([-msse4.1], [CFLAGS="$CFLAGS -msse4.1"])
349 AC_MSG_CHECKING(for SSE4.1 instructions set)
350 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
351 #pragma GCC target("sse4.1")
352 #include <smmintrin.h>
353 ]], [[ __m128i x = _mm_minpos_epu16(_mm_setzero_si128()); ]])],
355 AC_DEFINE([HAVE_SMMINTRIN_H], [1], [sse4.1 is available])
356 AX_CHECK_COMPILE_FLAG([-msse4.1], [CFLAGS_SSE41="-msse4.1"])],
361 AX_CHECK_COMPILE_FLAG([-mavx], [CFLAGS="$CFLAGS -mavx"])
362 AC_MSG_CHECKING(for AVX instructions set)
363 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
364 #pragma GCC target("avx")
365 #include <immintrin.h>
366 ]], [[ _mm256_zeroall(); ]])],
368 AC_DEFINE([HAVE_AVXINTRIN_H], [1], [AVX is available])
369 AX_CHECK_COMPILE_FLAG([-mavx], [CFLAGS_AVX="-mavx"])],
374 AX_CHECK_COMPILE_FLAG([-mavx2], [CFLAGS="$CFLAGS -mavx2"])
375 AC_MSG_CHECKING(for AVX2 instructions set)
376 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
377 #pragma GCC target("avx2")
378 #include <immintrin.h>
379 ]], [[ __m256i x = _mm256_abs_epi8(_mm256_setzero_si256()); ]])],
381 AC_DEFINE([HAVE_AVX2INTRIN_H], [1], [AVX2 is available])
382 AX_CHECK_COMPILE_FLAG([-mavx2], [CFLAGS_AVX="-mavx2"])
383 AC_MSG_CHECKING(if _mm256_broadcastsi128_si256 is correctly defined)
384 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
385 #pragma GCC target("avx2")
386 #include <immintrin.h>
387 ]], [[ __m256i y = _mm256_broadcastsi128_si256(_mm_setzero_si128()); ]])],
388 [AC_MSG_RESULT(yes)],
390 AC_DEFINE([_mm256_broadcastsi128_si256], [_mm_broadcastsi128_si256],
391 [Define to the local name of _mm256_broadcastsi128_si256])])
397 AX_CHECK_COMPILE_FLAG([-maes], [CFLAGS="$CFLAGS -maes"])
398 AX_CHECK_COMPILE_FLAG([-mpclmul], [CFLAGS="$CFLAGS -mpclmul"])
399 AC_MSG_CHECKING(for AESNI instructions set and PCLMULQDQ)
400 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
401 #pragma GCC target("aes")
402 #pragma GCC target("pclmul")
403 #include <wmmintrin.h>
404 ]], [[ __m128i x = _mm_aesimc_si128(_mm_setzero_si128());
405 __m128i y = _mm_clmulepi64_si128(_mm_setzero_si128(), _mm_setzero_si128(), 0);]])],
407 AC_DEFINE([HAVE_WMMINTRIN_H], [1], [aesni is available])
408 AX_CHECK_COMPILE_FLAG([-maes], [CFLAGS_AESNI="-maes"])
409 AX_CHECK_COMPILE_FLAG([-mpclmul], [CFLAGS_PCLMUL="-mpclmul"])
417 AC_SUBST(CFLAGS_SSE2)
418 AC_SUBST(CFLAGS_SSE3)
419 AC_SUBST(CFLAGS_SSSE3)
420 AC_SUBST(CFLAGS_SSE41)
422 AC_SUBST(CFLAGS_AVX2)
423 AC_SUBST(CFLAGS_AESNI)
424 AC_SUBST(CFLAGS_PCLMUL)
426 AC_CHECK_HEADERS([sys/mman.h])
428 dnl Checks for typedefs, structures, and compiler characteristics.
433 [ac_cv_c_bigendian=no]
436 AC_DEFINE(NATIVE_BIG_ENDIAN, 1, [machine is bigendian]),
437 AC_DEFINE(NATIVE_LITTLE_ENDIAN, 1, [machine is littleendian]),
438 AC_MSG_ERROR([unknown endianness]),
439 AC_MSG_ERROR([universal endianness is not supported - compile separately and use lipo(1)])
442 AC_MSG_CHECKING(whether __STDC_LIMIT_MACROS is required)
443 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
452 CPPFLAGS="$CPPFLAGS -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS"
456 AS_IF([test "$enable_asm" != "no"],[
457 AC_MSG_CHECKING(whether we can use x86_64 asm code)
458 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
460 #if defined(__amd64) || defined(__amd64__) || defined(__x86_64__)
461 # if defined(__CYGWIN__) || defined(__MINGW32__) || defined(__MINGW64__) || defined(_WIN32) || defined(_WIN64)
462 # error Windows x86_64 calling conventions are not supported yet
468 unsigned char i = 0, o = 0, t;
469 __asm__ __volatile__ ("pxor %%xmm12, %%xmm6 \n"
470 "movb (%[i]), %[t] \n"
471 "addb %[t], (%[o]) \n"
473 : [o] "D"(&o), [i] "S"(&i)
474 : "memory", "flags", "cc");
477 AC_DEFINE([HAVE_AMD64_ASM], [1], [x86_64 asm code can be used])
481 AM_CONDITIONAL([HAVE_AMD64_ASM], [test $HAVE_AMD64_ASM_V = 1])
482 AC_SUBST(HAVE_AMD64_ASM_V)
485 AS_IF([test "$enable_asm" != "no"],[
486 AC_MSG_CHECKING(whether we can assemble AVX opcodes)
487 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
489 #if defined(__amd64) || defined(__amd64__) || defined(__x86_64__)
490 # if defined(__CYGWIN__) || defined(__MINGW32__) || defined(__MINGW64__) || defined(_WIN32) || defined(_WIN64)
491 # error Windows x86_64 calling conventions are not supported yet
497 __asm__ __volatile__ ("vpunpcklqdq %xmm0,%xmm13,%xmm0");
500 AC_DEFINE([HAVE_AVX_ASM], [1], [AVX opcodes are supported])
504 AM_CONDITIONAL([HAVE_AVX_ASM], [test $HAVE_AVX_ASM_V = 1])
505 AC_SUBST(HAVE_AVX_ASM_V)
507 AC_MSG_CHECKING(for 128-bit arithmetic)
509 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
510 #if !defined(__GNUC__) && !defined(__SIZEOF_INT128__)
511 # error mode(TI) is a gcc extension, and __int128 is not available
513 #if defined(__clang__) && !defined(__x86_64__)
514 # error clang does not properly handle the 128-bit type on 32-bit systems
516 #ifndef NATIVE_LITTLE_ENDIAN
517 # error libsodium currently expects a little endian CPU for the 128-bit type
519 #ifdef __EMSCRIPTEN__
520 # error emscripten currently supports only shift operations on integers \
521 # larger than 64 bits
525 #if defined(__SIZEOF_INT128__)
526 typedef unsigned __int128 uint128_t;
528 typedef unsigned uint128_t __attribute__((mode(TI)));
530 void fcontract(uint128_t *t) {
531 *t += 0x8000000000000 - 1;
537 AC_DEFINE([HAVE_TI_MODE], [1], [gcc TI mode is available])
540 AM_CONDITIONAL([HAVE_TI_MODE], [test $HAVE_TI_MODE_V = 1])
541 AC_SUBST(HAVE_TI_MODE_V)
544 AS_IF([test "$enable_asm" != "no"],[
545 AC_MSG_CHECKING(for cpuid instruction)
546 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ ]], [[
547 unsigned int cpu_info[4];
548 __asm__ __volatile__ ("xchgl %%ebx, %k1; cpuid; xchgl %%ebx, %k1" :
549 "=a" (cpu_info[0]), "=&r" (cpu_info[1]),
550 "=c" (cpu_info[2]), "=d" (cpu_info[3]) :
554 AC_DEFINE([HAVE_CPUID], [1], [cpuid instruction is available])
558 AC_SUBST(HAVE_CPUID_V)
560 asm_hide_symbol="unsupported"
561 AS_IF([test "$enable_asm" != "no"],[
562 AC_MSG_CHECKING(if the .private_extern asm directive is supported)
563 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ ]], [[
564 __asm__ __volatile__ (".private_extern dummy_symbol \n"
565 ".private_extern _dummy_symbol \n"
566 ".globl dummy_symbol \n"
567 ".globl _dummy_symbol \n"
574 asm_hide_symbol=".private_extern"],
577 AC_MSG_CHECKING(if the .hidden asm directive is supported)
578 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ ]], [[
579 __asm__ __volatile__ (".hidden dummy_symbol \n"
580 ".hidden _dummy_symbol \n"
581 ".globl dummy_symbol \n"
582 ".globl _dummy_symbol \n"
589 AS_IF([test "$asm_hide_symbol" = "unsupported"],
590 [asm_hide_symbol=".hidden"],
591 [AC_MSG_NOTICE([unable to reliably tag symbols as private])
592 asm_hide_symbol="unsupported"])
596 AS_IF([test "$asm_hide_symbol" != "unsupported"],[
597 AC_DEFINE_UNQUOTED([ASM_HIDE_SYMBOL], [$asm_hide_symbol], [directive to hide symbols])
601 AC_MSG_CHECKING(if weak symbols are supported)
602 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
603 __attribute__((weak)) void __dummy(void *x) { }
604 void f(void *x) { __dummy(x); }
608 AC_DEFINE([HAVE_WEAK_SYMBOLS], [1], [weak symbols are supported])],
611 AC_MSG_CHECKING(if data alignment is required)
612 aligned_access_required=yes
614 [i?86|amd64|x86_64|powerpc*|s390*],
615 [aligned_access_required=no],
617 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
618 #ifndef __ARM_FEATURE_UNALIGNED
619 # error data alignment is required
621 ]], [[]])], [aligned_access_required=no], [])]
623 AS_IF([test "x$aligned_access_required" = "xyes"],
624 [AC_MSG_RESULT(yes)],
626 AC_DEFINE([CPU_UNALIGNED_ACCESS], [1], [unaligned memory access is supported])])
628 dnl Checks for functions and headers
630 AS_IF([test "x$EMSCRIPTEN" = "x"],[
631 AC_CHECK_FUNCS([arc4random arc4random_buf])
632 AC_CHECK_FUNCS([mmap mlock madvise mprotect explicit_bzero])
634 AC_CHECK_FUNCS([posix_memalign getpid])
636 AC_SUBST([LIBTOOL_EXTRA_FLAGS])
639 AS_IF([test "x$EMSCRIPTEN" != "x"],[
641 TEST_LDFLAGS='--memory-init-file 0 --pre-js pre.js.inc -s RESERVED_FUNCTION_POINTERS=8'
643 AC_SUBST(TEST_LDFLAGS)
644 AM_CONDITIONAL([EMSCRIPTEN], [test "x$EMSCRIPTEN" != "x"])
646 AM_CONDITIONAL([NATIVECLIENT], [test "x$NATIVECLIENT" != "x"])
656 AH_VERBATIM([NDEBUG], [/* Always evaluate assert() calls */
658 #/**/undef/**/ NDEBUG
661 AC_CONFIG_FILES([Makefile
664 libsodium-uninstalled.pc
665 msvc-scripts/Makefile
667 src/libsodium/Makefile
668 src/libsodium/include/Makefile
669 src/libsodium/include/sodium/version.h
670 test/default/Makefile