From 5b3be0729c380661b8db8e499e31363882eb9129 Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Tue, 27 Aug 2019 22:00:34 +0900
Subject: ngtcp2: Build with latest ngtcp2 and ngtcp2_crypto_openssl

Closes #4270
---
 configure.ac | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 718259699..07e0a502e 100755
--- a/configure.ac
+++ b/configure.ac
@@ -3427,6 +3427,61 @@ if test X"$want_tcp2" != Xno; then
 
 fi
 
+if test "x$NGTCP2_ENABLED" = "x1"; then
+  dnl backup the pre-ngtcp2_crypto_openssl variables
+  CLEANLDFLAGS="$LDFLAGS"
+  CLEANCPPFLAGS="$CPPFLAGS"
+  CLEANLIBS="$LIBS"
+
+  CURL_CHECK_PKGCONFIG(libngtcp2_crypto_openssl, $want_tcp2_path)
+
+  if test "$PKGCONFIG" != "no" ; then
+    LIB_NGTCP2_CRYPTO_OPENSSL=`CURL_EXPORT_PCDIR([$want_tcp2_path])
+      $PKGCONFIG --libs-only-l libngtcp2_crypto_openssl`
+    AC_MSG_NOTICE([-l is $LIB_NGTCP2_CRYPTO_OPENSSL])
+
+    CPP_NGTCP2_CRYPTO_OPENSSL=`CURL_EXPORT_PCDIR([$want_tcp2_path]) dnl
+      $PKGCONFIG --cflags-only-I libngtcp2_crypto_openssl`
+    AC_MSG_NOTICE([-I is $CPP_NGTCP2_CRYPTO_OPENSSL])
+
+    LD_NGTCP2_CRYPTO_OPENSSL=`CURL_EXPORT_PCDIR([$want_tcp2_path])
+      $PKGCONFIG --libs-only-L libngtcp2_crypto_openssl`
+    AC_MSG_NOTICE([-L is $LD_NGTCP2_CRYPTO_OPENSSL])
+
+    LDFLAGS="$LDFLAGS $LD_NGTCP2_CRYPTO_OPENSSL"
+    CPPFLAGS="$CPPFLAGS $CPP_NGTCP2_CRYPTO_OPENSSL"
+    LIBS="$LIB_NGTCP2_CRYPTO_OPENSSL $LIBS"
+
+    if test "x$cross_compiling" != "xyes"; then
+      DIR_NGTCP2_CRYPTO_OPENSSL=`echo $LD_NGTCP2_CRYPTO_OPENSSL | $SED -e 's/-L//'`
+    fi
+    AC_CHECK_LIB(ngtcp2_crypto_openssl, ngtcp2_crypto_ctx_initial,
+      [
+       AC_CHECK_HEADERS(ngtcp2/ngtcp2_crypto.h,
+          NGTCP2_ENABLED=1
+          AC_DEFINE(USE_NGTCP2_CRYPTO_OPENSSL, 1, [if ngtcp2_crypto_openssl is in use])
+          AC_SUBST(USE_NGTCP2_CRYPTO_OPENSSL, [1])
+          CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$DIR_NGTCP2_CRYPTO_OPENSSL"
+          export CURL_LIBRARY_PATH
+          AC_MSG_NOTICE([Added $DIR_NGTCP2_CRYPTO_OPENSSL to CURL_LIBRARY_PATH])
+       )
+      ],
+        dnl not found, revert back to clean variables
+        LDFLAGS=$CLEANLDFLAGS
+        CPPFLAGS=$CLEANCPPFLAGS
+        LIBS=$CLEANLIBS
+    )
+
+  else
+    dnl no ngtcp2_crypto_openssl pkg-config found, deal with it
+    if test X"$want_tcp2" != Xdefault; then
+      dnl To avoid link errors, we do not allow --with-ngtcp2 without
+      dnl a pkgconfig file
+      AC_MSG_ERROR([--with-ngtcp2 was specified but could not find ngtcp2_crypto_openssl pkg-config file.])
+    fi
+  fi
+fi
+
 dnl **********************************************************************
 dnl Check for nghttp3 (HTTP/3 with ngtcp2)
 dnl **********************************************************************
-- 
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