Move chacha_asm_src file information to build.info files

Reviewed-by: NMatt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9166)

Configurations/00-base-templates.conf

@@ -15,7 +15,6 @@ my %targets=(
 	thread_defines	=> [],
 
 	padlock_asm_src	=> "",
-	chacha_asm_src	=> "chacha_enc.c",
 	poly1305_asm_src	=> "",
 	keccak1600_asm_src	=> "keccak1600.c",
 
@@ -155,7 +154,6 @@ my %targets=(
     x86_asm => {
 	template	=> 1,
 	padlock_asm_src	=> "e_padlock-x86.s",
-	chacha_asm_src	=> "chacha-x86.s",
 	poly1305_asm_src=> "poly1305-x86.s",
     },
     x86_elf_asm => {
@@ -165,13 +163,11 @@ my %targets=(
     x86_64_asm => {
 	template	=> 1,
 	padlock_asm_src => "e_padlock-x86_64.s",
-	chacha_asm_src	=> "chacha-x86_64.s",
 	poly1305_asm_src=> "poly1305-x86_64.s",
 	keccak1600_asm_src	=> "keccak1600-x86_64.s",
     },
     ia64_asm => {
 	template	=> 1,
-	chacha_asm_src  => "chacha-ia64.S",
 	poly1305_asm_src=> "asm/poly1305-ia64.S",
     },
     sparcv9_asm => {
@@ -194,19 +190,16 @@ my %targets=(
     },
     s390x_asm => {
 	template	=> 1,
-	chacha_asm_src  => "chacha-s390x.S",
 	poly1305_asm_src=> "poly1305-s390x.S",
 	keccak1600_asm_src	=> "keccak1600-s390x.S",
     },
     armv4_asm => {
 	template	=> 1,
-	chacha_asm_src  => "chacha-armv4.S",
 	poly1305_asm_src=> "poly1305-armv4.S",
 	keccak1600_asm_src	=> "keccak1600-armv4.S",
     },
     aarch64_asm => {
 	template	=> 1,
-	chacha_asm_src  => "chacha-armv8.S",
 	poly1305_asm_src=> "poly1305-armv8.S",
 	keccak1600_asm_src	=> "keccak1600-armv8.S",
     },
@@ -219,7 +212,6 @@ my %targets=(
     },
     ppc32_asm => {
 	template	=> 1,
-	chacha_asm_src	=> "chacha-ppc.s",
 	poly1305_asm_src=> "poly1305-ppc.s poly1305-ppcfp.s",
     },
     ppc64_asm => {

Configurations/10-main.conf

@@ -949,7 +949,6 @@ my %targets = (
         cppflags         => combine("-DOPENSSL_SMALL_FOOTPRINT",
                                     threads("-D_REENTRANT")),
         bn_ops           => "BN_LLONG",
-        chacha_asm_src   => "chacha-c64xplus.s",
         poly1305_asm_src => "poly1305-c64xplus.s",
         thread_scheme    => "pthreads",
         asm_arch         => 'c64xplus',

Configure

@@ -3342,7 +3342,6 @@ sub print_table_entry
         "ex_libs",
         "bn_ops",
         "padlock_asm_src",
-        "chacha_asm_src",
         "poly1035_asm_src",
         "thread_scheme",
         "perlasm_scheme",

crypto/chacha/build.info

 LIBS=../../libcrypto
-SOURCE[../../libcrypto]={- $target{chacha_asm_src} -}
+
+$CHACHAASM=chacha_enc.c
+IF[{- !$disabled{asm} -}]
+  $CHACHAASM_x86=chacha-x86.s
+  $CHACHAASM_x86_64=chacha-x86_64.s
+
+  $CHACHAASM_ia64=chacha-ia64.S
+
+  $CHACHAASM_s390x=chacha-s390x.S
+
+  $CHACHAASM_armv4=chacha-armv4.S
+  $CHACHAASM_aarch64=chacha-armv8.S
+
+  $CHACHAASM_ppc32=chacha-ppc.s
+  $CHACHAASM_ppc64=$CHACHAASM_ppc32
+
+  $CHACHAASM_c64xplus=chacha-c64xplus.s
+
+  # Now that we have defined all the arch specific variables, use the
+  # appropriate one
+  IF[$CHACHAASM_{- $target{asm_arch} -}]
+    $CHACHAASM=$CHACHAASM_{- $target{asm_arch} -}
+  ENDIF
+ENDIF
+
+SOURCE[../../libcrypto]=$CHACHAASM
 
 GENERATE[chacha-x86.s]=asm/chacha-x86.pl \
         $(PERLASM_SCHEME) $(LIB_CFLAGS) $(LIB_CPPFLAGS) $(PROCESSOR)