Recompiling lwip gives error

[madhura-a]

Basic Infos

• [X ] This issue complies with the issue POLICY doc.
• [X ] I have read the documentation at readthedocs and the issue is not addressed there.
• I have tested that the issue is present in current master branch (aka latest git).
• [X ] I have searched the issue tracker for a similar issue.
• [X ] If there is a stack dump, I have decoded it.
• [X ] I have filled out all fields below.

Platform

• Hardware: ESP8266
• Core Version: [latest git ]
• Development Env: [Arduino IDE]
• Operating System: [Ubuntu]

Settings in IDE

• Module: [Nodemcu]
• Flash Size: [4MB]
• lwip Variant: [|v2 Lower Memory]
• Reset Method: [nodemcu]
• Flash Frequency: [40Mhz]
• CPU Frequency: [80Mhz]
• Upload Using: [SERIAL]
• Upload Speed: [115200] (serial upload only)

Problem Description

Recompiling the lwip library using following steps

1. Navigate to esp8266/tools/sdk/lwip/src
2. run make install command

Error

app/dhcpserver.c:22:34: error: expected '=', ',', ';', 'asm' or 'attribute' before 'ICACHE_RODATA_ATTR'
static const uint32 magic_cookie ICACHE_RODATA_ATTR = 0x63538263;
^
app/dhcpserver.c: In function 'create_msg':
app/dhcpserver.c:268:26: error: 'magic_cookie' undeclared (first use in this function)
uint32 magic_cookie1 = magic_cookie;
^
app/dhcpserver.c:268:26: note: each undeclared identifier is reported only once for each function it appears in
app/dhcpserver.c: In function 'parse_msg':
app/dhcpserver.c:559:14: error: 'magic_cookie' undeclared (first use in this function)
&magic_cookie,
^
make: *** [build/app/dhcpserver.o] Error 1

Can you please suggest me how to resolve this error ?

[d-a-v]

Fix will be merged in some minutes.

However I can see this in your message: lwip Variant: [|v2 Lower Memory]

If you want to recompile lwip-v2, it's in tools/sdk/lwip2