[Bug 253698] security/libgcrypt - compilation error when building jitterentropy-base.c for arm on poudriere

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253698

            Bug ID: 253698
           Summary: security/libgcrypt - compilation error when building
                    jitterentropy-base.c for arm on poudriere
           Product: Ports & Packages
           Version: Latest
          Hardware: arm
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: Individual Port(s)
          Assignee: cy at FreeBSD.org
          Reporter: yani at pi-greece.eu
          Assignee: cy at FreeBSD.org
             Flags: maintainer-feedback?(cy at FreeBSD.org)

Hello,

I'm receiving the following error when compiling for arm using poudriere.
Adding "--disable-jent-support" in the configure options fixes the problem, but
I'm not sure what the security implications are. 

libtool: compile:  cc -DHAVE_CONFIG_H -I. -I.. -I../src -I../src
-I/usr/local/include -O -pipe -fstack-protector-strong -fno-strict-aliasing
-std=gnu89 -fvisibility=hidden -fno-delete-null-pointer-checks -Wall -c
./rndjent.c  -fPIC -DPIC -o .libs/rndjent.o
In file included from ./rndjent.c:86:
./jitterentropy-base.c:53:13: warning: unknown pragma ignored
[-Wunknown-pragmas]
#pragma GCC optimize ("O0")
            ^
./jitterentropy-base.c:60:4: error: "The CPU Jitter random number generator
must not be compiled with optimizations. See documentation. Use the compiler
switch -O0 for compiling jitterentropy-base.c."
  #error "The CPU Jitter random number generator must not be compiled with
optimizations. See documentation. Use the compiler switch -O0 for compiling
jitterentropy-base.c."
   ^
1 warning and 1 error generated.
*** Error code 1

Stop.
make[3]: stopped in
/wrkdirs/usr/ports/security/libgcrypt/work/libgcrypt-1.9.2/random
*** Error code 1
*** Error code 1
*** Error code 1

Stop.
make: stopped in /usr/ports/security/libgcrypt

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