libtomcrypt compiling

[Giuseppe Triolo]

After i type ./configure make make install i am trying to compile the example aes.c inside the directory src/ciphers/aes/aes.c ;  i have the following error:

占쏙옙libtomcrypt-1.17/src/ciphers/aes#    gcc -o aes aes.c

In file included from /usr/include/tomcrypt.h:67,

                 from aes.c:33:

/usr/include/tomcrypt_macros.h: In function 'RORc':

/usr/include/tomcrypt_macros.h:275: error impossible contraint in 'asm' 

How can i compile it ?

Thanks

[Giuseppe Triolo]

Ubunti 12.04 on Virtual machine!

---

Date: Wed, 27 Jun 2012 07:08:15 -0700
From: jfvo...@gmail.com
To: lib...@googlegroups.com
Subject: [libtom] Re: libtomcrypt compiling

what OS are you using?

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[yinx...@gmail.com]

hi, have you found the solution?

[georg....@gmail.com]

In the BitKeeper source, we've been carrying this patch around for awhile (we first saw the same errors as the original poster on Macs using Apple's toolchain).

(also, the "develop" branch on github solves the problem differently)

-g

src/headers/tomcrypt_macros.h@1.22, 2015-06-09 09:27:59-04:00, wscott@bitkeeper.com
  x86 only allows variable shifts and rotates with the CL register.
  Change the inline asm to use CL explicitly and update the constraints to
  reflect that.
===== tomcrypt_macros.h 1.21 vs 1.22 =====

--- 1.21/src/tomcrypt/src/headers/tomcrypt_macros.h 2015-03-24 14:45:42 -04:00
+++ 1.22/src/tomcrypt/src/headers/tomcrypt_macros.h 2015-06-09 09:27:59 -04:00
@@ -264,17 +264,17 @@ static inline unsigned ROLc(unsigned wor
 
 static inline unsigned ROLc(unsigned word, const int i)
 {
-   asm ("roll %2,%0"
+   asm ("roll %%cl,%0"
       :"=r" (word)
-      :"0" (word),"I" (i));
+      :"0" (word),"c" (i));
    return word;
 }
 
 static inline unsigned RORc(unsigned word, const int i)
 {
-   asm ("rorl %2,%0"
+   asm ("rorl %%cl,%0"
       :"=r" (word)
-      :"0" (word),"I" (i));
+      :"0" (word),"c" (i));
    return word;
 }
 
@@ -363,17 +363,17 @@ static inline unsigned long ROL64c(unsig
 
 static inline unsigned long ROL64c(unsigned long word, const int i)
 {
-   asm("rolq %2,%0"
+   asm("rolq %%cl,%0"
       :"=r" (word)
-      :"0" (word),"J" (i));
+      :"0" (word),"c" (i));
    return word;
 }
 
 static inline unsigned long ROR64c(unsigned long word, const int i)
 {
-   asm("rorq %2,%0"
+   asm("rorq %%cl,%0"
       :"=r" (word)
-      :"0" (word),"J" (i));
+      :"0" (word),"c" (i));
    return word;
 }