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dnl Save compile-altering variables we are changing
SAVE_LIBS="${LIBS}"
SAVE_CFLAGS="${CFLAGS}"
SAVE_CPPFLAGS="${CPPFLAGS}"
dnl Update compile-altering variables to include the OpenSSL libraries
LIBS="${SAVE_LIBS} ${TCLTLS_SSL_LIBS}"
CFLAGS="${SAVE_CFLAGS} ${TCLTLS_SSL_CFLAGS}"
CPPFLAGS="${SAVE_CPPFLAGS} ${TCLTLS_SSL_CPPFLAGS}"
dnl Verify that basic functionality is there
AC_LANG_PUSH(C)
AC_MSG_CHECKING([if a basic OpenSSL program works])
AC_LINK_IFELSE([AC_LANG_PROGRAM([
#include <openssl/ssl.h>
#include <openssl/opensslv.h>
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dnl Save compile-altering variables we are changing
SAVE_LIBS="${LIBS}"
SAVE_CFLAGS="${CFLAGS}"
SAVE_CPPFLAGS="${CPPFLAGS}"
dnl Update compile-altering variables to include the OpenSSL libraries
LIBS="${TCLTLS_SSL_LIBS} ${SAVE_LIBS} ${TCLTLS_SSL_LIBS}"
CFLAGS="${TCLTLS_SSL_CFLAGS} ${SAVE_CFLAGS} ${TCLTLS_SSL_CFLAGS}"
CPPFLAGS="${TCLTLS_SSL_CPPFLAGS} ${SAVE_CPPFLAGS} ${TCLTLS_SSL_CPPFLAGS}"
dnl Verify that basic functionality is there
AC_LANG_PUSH(C)
AC_MSG_CHECKING([if a basic OpenSSL program works])
AC_LINK_IFELSE([AC_LANG_PROGRAM([
#include <openssl/ssl.h>
#include <openssl/opensslv.h>
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