Fix demo compilation error with occlum-gcc on ubuntu 20.04

demos/fish/download_and_build.sh

@@ -1,6 +1,8 @@
 #!/bin/bash
 set -e
 
+OCCLUM_GCC_INC_DIR=/usr/local/occlum/include
+
 rm -rf ncurses
 # download and install ncurses
 git clone -b v6.1 --depth 1 https://github.com/mirror/ncurses.git
@@ -11,9 +13,8 @@ make -j$(nproc) && make install
 cd ..
 
 # download and build FISH
-git clone -b 3.1.2 --depth 1 https://github.com/fish-shell/fish-shell.git
+git clone -b 3.3.1 --depth 1 https://github.com/fish-shell/fish-shell.git
 cd fish-shell
-git apply ../fish.patch
 mkdir build && cd build
 cmake ../  -DCMAKE_BUILD_TYPE=Debug -DCURSES_LIBRARY=/opt/occlum/toolchains/gcc/lib/libcurses.a \
 -DCMAKE_C_COMPILER=occlum-gcc -DCMAKE_CXX_COMPILER=occlum-g++ \
@@ -21,8 +22,12 @@ cmake ../  -DCMAKE_BUILD_TYPE=Debug -DCURSES_LIBRARY=/opt/occlum/toolchains/gcc/
 -DCMAKE_CXX_COMPILER_RANLIB=/usr/local/occlum/bin/occlum-ranlib \
 -DCMAKE_C_COMPILER_AR=/usr/local/occlum/bin/occlum-ar \
 -DCMAKE_C_COMPILER_RANLIB=/usr/local/occlum/bin/occlum-ranlib \
+-DCURSES_INCLUDE_PATH=$OCCLUM_GCC_INC_DIR \
+-DIntl_INCLUDE_DIR=$OCCLUM_GCC_INC_DIR \
+-DSYS_PCRE2_INCLUDE_DIR=$OCCLUM_GCC_INC_DIR \
+-DZLIB_INCLUDE_DIR=$OCCLUM_GCC_INC_DIR \
+-DCMAKE_INSTALL_OLDINCLUDEDIR=$OCCLUM_GCC_INC_DIR \
 -DCMAKE_LINKER=/usr/local/occlum/bin/occlum-ld -DCMAKE_C_FLAGS="-I/usr/local/occlum/include -fpic -pie" \
 -DCMAKE_CXX_FLAGS="-I/usr/local/occlum/include -fpic -pie"
 make -j$(nproc)
 cd ../../
-

demos/fish/fish.patch

@@ -1,13 +0,0 @@
-diff --git a/src/exec.cpp b/src/exec.cpp
-index 1557caf0b..254dd0e2e 100644
---- a/src/exec.cpp
-+++ b/src/exec.cpp
-@@ -565,7 +565,7 @@ static bool exec_external_command(parser_t &parser, const std::shared_ptr<job_t>
- 
- #if FISH_USE_POSIX_SPAWN
-     // Prefer to use posix_spawn, since it's faster on some systems like OS X.
--    bool use_posix_spawn = g_use_posix_spawn && can_use_posix_spawn_for_job(j, dup2s);
-+    bool use_posix_spawn = g_use_posix_spawn; //&& can_use_posix_spawn_for_job(j, dup2s);
-     if (use_posix_spawn) {
-         s_fork_count++;  // spawn counts as a fork+exec
-         // Create posix spawn attributes and actions.

demos/grpc/grpc_tls/download_and_install_grpc.sh

@@ -2,6 +2,7 @@
 set -e
 
 INSTALL_DIR=/usr/local/occlum/x86_64-linux-musl
+OCCLUM_GCC_INC_DIR=/usr/local/occlum/include
 GRPC_VER=1.24.3
 GRPC_SRC_DIR=$PWD/grpc-src
 CARES_VER=1_15_0
@@ -42,7 +43,9 @@ cmake ../ \
 	-Dprotobuf_BUILD_TESTS=OFF -DBUILD_SHARED_LIBS=TRUE \
 	-DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=occlum-gcc \
 	-DCMAKE_CXX_COMPILER=occlum-g++ -DCMAKE_INSTALL_PREFIX=$INSTALL_DIR \
-	-DCMAKE_NO_SYSTEM_FROM_IMPORTED=TRUE
+	-DCMAKE_NO_SYSTEM_FROM_IMPORTED=TRUE \
+	-DCMAKE_INSTALL_OLDINCLUDEDIR=$OCCLUM_GCC_INC_DIR \
+	-DZLIB_INCLUDE_DIR=$OCCLUM_GCC_INC_DIR
 
 make -j$(nproc)
 make install

demos/grpc/grpc_tls/download_and_install_openssl.sh

@@ -2,9 +2,8 @@
 #copyright@antfinancial:adopted from a script written by geding
 set -e
 
-git clone http://github.com/openssl/openssl
+git clone -b OpenSSL_1_1_1 --depth 1 http://github.com/openssl/openssl
 cd openssl
-git checkout tags/OpenSSL_1_1_1
 CC=occlum-gcc ./config \
     --prefix=/usr/local/occlum/x86_64-linux-musl \
     --openssldir=/usr/local/occlum/x86_64-linux-musl/ssl \