So this is my first time installing RN with npx create-react-native-app, and then i got this warning.

I followed the instrcution and install pod like npx pod-install. then i got another error as below. I have no idea what happened...

Please help me! Thank you guys!

Installing glog (0.3.5)
[!] /bin/bash -c
set -e
#!/bin/bash

Copyright (c) Facebook, Inc. and its affiliates.

This source code is licensed under the MIT license found in the

LICENSE file in the root directory of this source tree.

set -e

PLATFORM_NAME="${PLATFORM_NAME:-iphoneos}"
CURRENT_ARCH="${CURRENT_ARCH}"

if [ -z "$CURRENT_ARCH" ] || [ "$CURRENT_ARCH" == "undefined_arch" ]; then
# Xcode 10 beta sets CURRENT_ARCH to "undefined_arch", this leads to incorrect linker arg.
# it's better to rely on platform name as fallback because architecture differs between simulator and device

if [[ "$PLATFORM_NAME" == *"simulator"* ]]; then
    CURRENT_ARCH="x86_64"
else
    CURRENT_ARCH="armv7"
fi

fi

export CC="$(xcrun -find -sdk $PLATFORM_NAME cc) -arch $CURRENT_ARCH -isysroot $(xcrun -sdk $PLATFORM_NAME --show-sdk-path)"
export CXX="$CC"

Remove automake symlink if it exists

if [ -h "test-driver" ]; then
rm test-driver
fi

./configure --host arm-apple-darwin

Fix build for tvOS

cat << EOF >> src/config.h

/* Add in so we have Apple Target Conditionals */
#ifdef APPLE
#include <TargetConditionals.h>
#include <Availability.h>
#endif

/* Special configuration for AppleTVOS */
#if TARGET_OS_TV
#undef HAVE_SYSCALL_H
#undef HAVE_SYS_SYSCALL_H
#undef OS_MACOSX
#endif

/* Special configuration for ucontext */
#undef HAVE_UCONTEXT_H
#undef PC_FROM_UCONTEXT
#if defined(x86_64)
#define PC_FROM_UCONTEXT uc_mcontext->__ss.__rip
#elif defined(i386)
#define PC_FROM_UCONTEXT uc_mcontext->__ss.__eip
#endif
EOF

Prepare exported header include

EXPORTED_INCLUDE_DIR="exported/glog"
mkdir -p exported/glog
cp -f src/glog/log_severity.h "$EXPORTED_INCLUDE_DIR/"
cp -f src/glog/logging.h "$EXPORTED_INCLUDE_DIR/"
cp -f src/glog/raw_logging.h "$EXPORTED_INCLUDE_DIR/"
cp -f src/glog/stl_logging.h "$EXPORTED_INCLUDE_DIR/"
cp -f src/glog/vlog_is_on.h "$EXPORTED_INCLUDE_DIR/"

checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for arm-apple-darwin-strip... no
checking for strip... strip
checking for a thread-safe mkdir -p... ./install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking for arm-apple-darwin-gcc... /Library/Developer/CommandLineTools/usr/bin/cc -arch armv7 -isysroot
checking whether the C compiler works... no
xcrun: error: SDK "iphoneos" cannot be located
xcrun: error: SDK "iphoneos" cannot be located
xcrun: error: SDK "iphoneos" cannot be located
xcrun: error: unable to lookup item 'Path' in SDK 'iphoneos'
/Users/samyao/Library/Caches/CocoaPods/Pods/External/glog/2263bd123499e5b93b5efe24871be317-40a13/missing: Unknown --is-lightweight' option Try /Users/samyao/Library/Caches/CocoaPods/Pods/External/glog/2263bd123499e5b93b5efe24871be317-40a13/missing --help' for more information
configure: WARNING: 'missing' script is too old or missing
configure: error: in /Users/samyao/Library/Caches/CocoaPods/Pods/External/glog/2263bd123499e5b93b5efe24871be317-40a13': configure: error: C compiler cannot create executables See config.log' for more details

Aborting run
An unexpected error was encountered. Please report it as a bug:
CocoaPodsError: Command pod install failed.
└─ Cause: pod exited with non-zero code: 1
at CocoaPodsPackageManager._installAsync (/Users/samyao/.npm/_npx/65824/lib/node_modules/pod-install/build/index.js:2:92213)
at processTicksAndRejections (internal/process/task_queues.js:97:5) {
code: 'COMMAND_FAILED',
cause: Error: pod exited with non-zero code: 1
at ChildProcess.h (/Users/samyao/.npm/_npx/65824/lib/node_modules/pod-install/build/index.js:2:1073)
at Object.onceWrapper (events.js:421:26)
at ChildProcess.emit (events.js:314:20)
at maybeClose (internal/child_process.js:1022:16)
at Process.ChildProcess._handle.onexit (internal/child_process.js:287:5)
...
at Object.spawnAsync [as default] (/Users/samyao/.npm/_npx/65824/lib/node_modules/pod-install/build/index.js:2:558)
at CocoaPodsPackageManager._runAsync (/Users/samyao/.npm/_npx/65824/lib/node_modules/pod-install/build/index.js:2:92995)
at CocoaPodsPackageManager._installAsync (/Users/samyao/.npm/_npx/65824/lib/node_modules/pod-install/build/index.js:2:90499)
at CocoaPodsPackageManager.installAsync (/Users/samyao/.npm/_npx/65824/lib/node_modules/pod-install/build/index.js:2:90187)
at runAsync (/Users/samyao/.npm/_npx/65824/lib/node_modules/pod-install/build/index.js:2:106206)
at processTicksAndRejections (internal/process/task_queues.js:97:5)
at async /Users/samyao/.npm/_npx/65824/lib/node_modules/pod-install/build/index.js:2:106284 {
pid: 65834,
output: [ '', '' ],
stdout: '',
stderr: '',
status: 1,
signal: null
},
isPackageManagerError: true
}