my $gcc_devteam_warn = "-Wall -pedantic -DPEDANTIC -Wno-long-long -Wsign-compare -Wmissing-prototypes -Wshadow -Wformat -Werror -DCRYPTO_MDEBUG_ALL -DCRYPTO_MDEBUG_ABORT -DREF_CHECK -DOPENSSL_NO_DEPRECATED";
+my $clang_disabled_warnings = "-Wno-language-extension-token -Wno-extended-offsetof -Wno-padded -Wno-shorten-64-to-32 -Wno-format-nonliteral -Wno-missing-noreturn -Wno-unused-parameter -Wno-sign-conversion -Wno-unreachable-code -Wno-conversion -Wno-documentation -Wno-missing-variable-declarations -Wno-cast-align -Wno-incompatible-pointer-types-discards-qualifiers -Wno-missing-variable-declarations -Wno-missing-field-initializers -Wno-unused-macros -Wno-disabled-macro-expansion -Wno-conditional-uninitialized -Wno-switch-enum";
+
my $strict_warnings = 0;
my $x86_gcc_des="DES_PTR DES_RISC1 DES_UNROLL";
# throw in -D[BL]_ENDIAN, whichever appropriate...
"linux-generic32","gcc:-DTERMIO -O3 -fomit-frame-pointer -Wall::-D_REENTRANT::-ldl:BN_LLONG RC4_CHAR RC4_CHUNK DES_INT DES_UNROLL BF_PTR:${no_asm}:dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
"linux-ppc", "gcc:-DB_ENDIAN -DTERMIO -O3 -Wall::-D_REENTRANT::-ldl:BN_LLONG RC4_CHAR RC4_CHUNK DES_RISC1 DES_UNROLL:${ppc32_asm}:linux32:dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
-# It's believed that majority of ARM toolchains predefine appropriate -march.
-# If you compiler does not, do complement config command line with one!
+
+#######################################################################
+# Note that -march is not among compiler options in below linux-armv4
+# target line. Not specifying one is intentional to give you choice to:
+#
+# a) rely on your compiler default by not specifying one;
+# b) specify your target platform explicitly for optimal performance,
+# e.g. -march=armv6 or -march=armv7-a;
+# c) build "universal" binary that targets *range* of platforms by
+# specifying minimum and maximum supported architecture;
+#
+# As for c) option. It actually makes no sense to specify maximum to be
+# less than ARMv7, because it's the least requirement for run-time
+# switch between platform-specific code paths. And without run-time
+# switch performance would be equivalent to one for minimum. Secondly,
+# there are some natural limitations that you'd have to accept and
+# respect. Most notably you can *not* build "universal" binary for
+# big-endian platform. This is because ARMv7 processor always picks
+# instructions in little-endian order. Another similar limitation is
+# that -mthumb can't "cross" -march=armv6t2 boundary, because that's
+# where it became Thumb-2. Well, this limitation is a bit artificial,
+# because it's not really impossible, but it's deemed too tricky to
+# support. And of course you have to be sure that your binutils are
+# actually up to the task of handling maximum target platform. With all
+# this in mind here is an example of how to configure "universal" build:
+#
+# ./Configure linux-armv4 -march=armv6 -D__ARM_MAX_ARCH__=8
+#
"linux-armv4", "gcc:-DTERMIO -O3 -Wall::-D_REENTRANT::-ldl:BN_LLONG RC4_CHAR RC4_CHUNK DES_INT DES_UNROLL BF_PTR:${armv4_asm}:dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
"linux-aarch64","gcc:-DTERMIO -O3 -Wall::-D_REENTRANT::-ldl:SIXTY_FOUR_BIT_LONG RC4_CHAR RC4_CHUNK DES_INT DES_UNROLL BF_PTR:${aarch64_asm}:linux64:dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
# Configure script adds minimally required -march for assembly support,
"linux-ia64", "gcc:-DL_ENDIAN -DTERMIO -O3 -Wall::-D_REENTRANT::-ldl:SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_UNROLL DES_INT:${ia64_asm}:dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
"linux-ia64-icc","icc:-DL_ENDIAN -DTERMIO -O2 -Wall::-D_REENTRANT::-ldl -no_cpprt:SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_RISC1 DES_INT:${ia64_asm}:dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
"linux-x86_64", "gcc:-m64 -DL_ENDIAN -DTERMIO -O3 -Wall::-D_REENTRANT::-ldl:SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_INT DES_UNROLL:${x86_64_asm}:elf:dlfcn:linux-shared:-fPIC:-m64:.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR):::64",
+"linux-x86_64-clang", "clang: -m64 -DL_ENDIAN -DTERMIO -O3 -Weverything $clang_disabled_warnings -Qunused-arguments::-D_REENTRANT::-ldl:SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_INT DES_UNROLL:${x86_64_asm}:elf:dlfcn:linux-shared:-fPIC:-m64:.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR):::64",
"linux-x86_64-icc", "icc:-DL_ENDIAN -DTERMIO -O2::-D_REENTRANT::-ldl -no_cpprt:SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_INT DES_UNROLL:${x86_64_asm}:elf:dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR):::64",
"linux-x32", "gcc:-mx32 -DL_ENDIAN -DTERMIO -O3 -Wall::-D_REENTRANT::-ldl:SIXTY_FOUR_BIT RC4_CHUNK_LL DES_INT DES_UNROLL:${x86_64_asm}:elf:dlfcn:linux-shared:-fPIC:-mx32:.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR):::x32",
"linux64-s390x", "gcc:-m64 -DB_ENDIAN -DTERMIO -O3 -Wall::-D_REENTRANT::-ldl:SIXTY_FOUR_BIT_LONG RC4_CHAR RC4_CHUNK DES_INT DES_UNROLL:${s390x_asm}:64:dlfcn:linux-shared:-fPIC:-m64:.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR):::64",
if ($strict_warnings)
{
my $wopt;
- die "ERROR --strict-warnings requires gcc" unless ($cc =~ /gcc$/);
+ die "ERROR --strict-warnings requires gcc or clang" unless ($cc =~ /gcc$/ or $cc =~ /clang$/);
foreach $wopt (split /\s+/, $gcc_devteam_warn)
{
$cflags .= " $wopt" unless ($cflags =~ /$wopt/)
projects / openssl.git / blobdiff