我一直在尝试从源代码构建httpd-2.4.43，并包含了OpenSSL-fips-2.0.16。
然而，我在httpd的构建过程中遇到了一个错误。请参阅下面的内容;

make[2]: Entering directory `/root/httpd/httpd-2.4.43/support'
/root/httpd/httpd-2.4.43/srclib/apr/libtool --silent --mode=compile gcc -std=gnu99 -I/opt/openssl-fips-2.0.16/include  -g -O2 -pthread      -DLINUX -D_REENTRANT -D_GNU_SOURCE   \
      -I. -I/root/httpd/httpd-2.4.43/os/unix -I/root/httpd/httpd-2.4.43/include -I/root/httpd/httpd-2.4.43/srclib/apr/include -I/root/httpd/httpd-2.4.43/srclib/apr-util/include -I/usr/local/include -I/root/httpd/httpd-2.4.43/modules/aaa -I/root/httpd/httpd-2.4.43/modules/cache -I/root/httpd/httpd-2.4.43/modules/core -I/root/httpd/httpd-2.4.43/modules/database -I/root/httpd/httpd-2.4.43/modules/filters -I/root/httpd/httpd-2.4.43/modules/ldap -I/root/httpd/httpd-2.4.43/server -I/root/httpd/httpd-2.4.43/modules/loggers -I/root/httpd/httpd-2.4.43/modules/lua -I/root/httpd/httpd-2.4.43/modules/proxy -I/root/httpd/httpd-2.4.43/modules/http2 -I/root/httpd/httpd-2.4.43/modules/session -I/root/httpd/httpd-2.4.43/modules/ssl -I/root/httpd/httpd-2.4.43/modules/test -I/root/httpd/httpd-2.4.43/server -I/root/httpd/httpd-2.4.43/modules/md -I/root/httpd/httpd-2.4.43/modules/arch/unix -I/root/httpd/httpd-2.4.43/modules/dav/main -I/root/httpd/httpd-2.4.43/modules/generators -I/root/httpd/httpd-2.4.43/modules/mappers  -prefer-non-pic -static -c ab.c && touch ab.lo
In file included from ab.c:161:0:
/opt/openssl-fips-2.0.16/include/openssl/rsa.h:62:26: fatal error: openssl/asn1.h: No such file or directory
 #include <openssl/asn1.h>
                          ^
compilation terminated.
make[2]: *** [ab.lo] Error 1

上述错误消息指出缺少asn1.h。
我不知道在哪里可以找到它。也许有一个从源代码构建OpenSSL的过程丢失了？我觉得我在从源代码构建OpenSSL时错过了一些东西。
请一定要给我指出正确的方向。