diff --git a/crypto/Makefile b/crypto/Makefile
index 4ace5bc43..6167b7d56 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -78,9 +78,9 @@ ia64cpuid.s: ia64cpuid.S;	$(CC) $(CFLAGS) -E ia64cpuid.S > $@
 ppccpuid.s:	ppccpuid.pl;	$(PERL) ppccpuid.pl $(PERLASM_SCHEME) $@
 pariscid.s:	pariscid.pl;	$(PERL) pariscid.pl $(PERLASM_SCHEME) $@
 alphacpuid.s:	alphacpuid.pl
-	(preproc=/tmp/$$$$.$@; trap "rm $$preproc" INT; \
+	(preproc=$$$$.$@.S; trap "rm $$preproc" INT; \
 	$(PERL) alphacpuid.pl > $$preproc && \
-	$(CC) -E $$preproc > $@ && rm $$preproc)
+	$(CC) -E -P $$preproc > $@ && rm $$preproc)
 
 testapps:
 	[ -z "$(THIS)" ] || (	if echo $(SDIRS) | fgrep ' des '; \
diff --git a/crypto/bn/Makefile b/crypto/bn/Makefile
index af23cef92..f1eb639aa 100644
--- a/crypto/bn/Makefile
+++ b/crypto/bn/Makefile
@@ -135,9 +135,9 @@ ppc-mont.s:	asm/ppc-mont.pl;$(PERL) asm/ppc-mont.pl $(PERLASM_SCHEME) $@
 ppc64-mont.s:	asm/ppc64-mont.pl;$(PERL) asm/ppc64-mont.pl $(PERLASM_SCHEME) $@
 
 alpha-mont.s:	asm/alpha-mont.pl
-	(preproc=/tmp/$$$$.$@; trap "rm $$preproc" INT; \
+	(preproc=$$$$.$@.S; trap "rm $$preproc" INT; \
 	$(PERL) asm/alpha-mont.pl > $$preproc && \
-	$(CC) -E $$preproc > $@ && rm $$preproc)
+	$(CC) -E -P $$preproc > $@ && rm $$preproc)
 
 # GNU make "catch all"
 %-mont.S:	asm/%-mont.pl;	$(PERL) $< $(PERLASM_SCHEME) $@
diff --git a/crypto/modes/Makefile b/crypto/modes/Makefile
index 7327b51b9..cbcbfad4b 100644
--- a/crypto/modes/Makefile
+++ b/crypto/modes/Makefile
@@ -55,9 +55,9 @@ aesni-gcm-x86_64.s:	asm/aesni-gcm-x86_64.pl
 ghash-sparcv9.s:	asm/ghash-sparcv9.pl
 	$(PERL) asm/ghash-sparcv9.pl $@ $(CFLAGS)
 ghash-alpha.s:	asm/ghash-alpha.pl
-	(preproc=/tmp/$$$$.$@; trap "rm $$preproc" INT; \
+	(preproc=$$$$.$@.S; trap "rm $$preproc" INT; \
 	$(PERL) asm/ghash-alpha.pl > $$preproc && \
-	$(CC) -E $$preproc > $@ && rm $$preproc)
+	$(CC) -E -P $$preproc > $@ && rm $$preproc)
 ghash-parisc.s:	asm/ghash-parisc.pl
 	$(PERL) asm/ghash-parisc.pl $(PERLASM_SCHEME) $@
 ghashv8-armx.S:	asm/ghashv8-armx.pl
diff --git a/crypto/sha/Makefile b/crypto/sha/Makefile
index a7fac4683..a8c0cf785 100644
--- a/crypto/sha/Makefile
+++ b/crypto/sha/Makefile
@@ -60,9 +60,9 @@ sha256-armv4.S: asm/sha256-armv4.pl
 	$(PERL) $< $(PERLASM_SCHEME) $@
 
 sha1-alpha.s:	asm/sha1-alpha.pl
-	(preproc=/tmp/$$$$.$@; trap "rm $$preproc" INT; \
+	(preproc=$$$$.$@.S; trap "rm $$preproc" INT; \
 	$(PERL) asm/sha1-alpha.pl > $$preproc && \
-	$(CC) -E $$preproc > $@ && rm $$preproc)
+	$(CC) -E -P $$preproc > $@ && rm $$preproc)
 
 # Solaris make has to be explicitly told
 sha1-x86_64.s:	asm/sha1-x86_64.pl;	$(PERL) asm/sha1-x86_64.pl $(PERLASM_SCHEME) > $@