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- use GNU Make, to avoid errors: ``` make: Fatal error in reader: Makefile, line 983: Badly formed macro assignment ``` Ref: https://github.com/libssh2/libssh2/actions/runs/7134629175/job/19429838379#step:3:1956 Caused by `?=` in `Makefile.am`. Fix it just in case. ``` make: Fatal error in reader: Makefile, line 438: Unexpected end of line seen ``` Ref: https://github.com/libssh2/libssh2/actions/runs/7135524843/job/19432451767#step:3:1966 It's around line 43 in `Makefile.am`, reason undiscovered. - fix error: ``` ../../src/hostkey.c:1227:44: error: pointer targets in passing argument 5 of '_libssh2_ed25519_sign' differ in signedness [-Werror=pointer-sign] 1227 | datavec[0].iov_base, datavec[0].iov_len); | ~~~~~~~~~~^~~~~~~~~ | | | caddr_t {aka char *} ``` Ref: https://github.com/libssh2/libssh2/actions/runs/7135102832/job/19431233967#step:3:2225 https://docs.oracle.com/cd/E36784_01/html/E36887/iovec-9s.html - FIXME: new `-Wsign-conversion` warnings appeared in examples: ``` ../../example/direct_tcpip.c:251:9: warning: conversion to 'long unsigned int' from 'libssh2_socket_t' {aka 'int'} may change the sign of the result [-Wsign-conversion] 251 | FD_SET(forwardsock, &fds); | ^~~~~~ ../../example/direct_tcpip.c:251:9: warning: conversion to 'long unsigned int' from 'libssh2_socket_t' {aka 'int'} may change the sign of the result [-Wsign-conversion] ../../example/direct_tcpip.c:251:9: warning: conversion to 'long unsigned int' from 'long int' may change the sign of the result [-Wsign-conversion] ../../example/direct_tcpip.c:251:9: warning: conversion to 'long int' from 'long unsigned int' may change the sign of the result [-Wsign-conversion] ../../example/direct_tcpip.c:259:18: warning: conversion to 'long unsigned int' from 'libssh2_socket_t' {aka 'int'} may change the sign of the result [-Wsign-conversion] 259 | if(rc && FD_ISSET(forwardsock, &fds)) { | ^~~~~~~~ ../../example/direct_tcpip.c:259:18: warning: conversion to 'long unsigned int' from 'libssh2_socket_t' {aka 'int'} may change the sign of the result [-Wsign-conversion] ../../example/direct_tcpip.c:259:18: warning: conversion to 'long unsigned int' from 'long int' may change the sign of the result [-Wsign-conversion] [...] ``` Ref: https://github.com/libssh2/libssh2/actions/runs/7136086865/job/19433997429#step:3:3450 Cherry-picked from #1277