From 15f7aba2dae1514d4584812b38d5ab91251fe58b Mon Sep 17 00:00:00 2001
From: Viktor Szakats <commit@vsz.me>
Date: Mon, 9 Oct 2023 21:40:21 +0000
Subject: [PATCH] test cmake pre-fill detections 1

---
 _build.sh  | 30 ++++++++++++++++++++++++++++++
 brotli.sh  |  2 +-
 cares.sh   |  2 +-
 nghttp2.sh |  2 +-
 nghttp3.sh |  2 +-
 ngtcp2.sh  |  2 +-
 zstd.sh    |  2 +-
 7 files changed, 36 insertions(+), 6 deletions(-)

diff --git a/_build.sh b/_build.sh
index 75f810f2a..e87ebda7e 100755
--- a/_build.sh
+++ b/_build.sh
@@ -1019,6 +1019,36 @@ build_single_target() {
   [ "${_CC}" = 'llvm' ] && _CFLAGS_GLOBAL_WPICKY="${_CFLAGS_GLOBAL_WPICKY} -Wassign-enum -Wcomma -Wextra-semi-stmt -Wshift-sign-overflow -Wshorten-64-to-32"
   [ "${_CC}" = 'gcc'  ] && _CFLAGS_GLOBAL_WPICKY="${_CFLAGS_GLOBAL_WPICKY} -Walloc-zero -Warith-conversion -Warray-bounds=2 -Wduplicated-branches -Wduplicated-cond -Wformat-overflow=2 -Wformat-truncation=1 -Wformat=2 -Wmissing-parameter-type -Wno-pedantic-ms-format -Wnull-dereference -Wold-style-declaration -Wrestrict -Wshift-negative-value -Wshift-overflow=2 -Wstrict-aliasing=3 -fdelete-null-pointer-checks -ftree-vrp"
 
+  # fast-track well-known auto-detection results to speed up CMake configuration stages:
+  export _CMAKE_HAVE=''
+
+  if true; then
+    # C89 standard headers
+    _CMAKE_HAVE="${_CMAKE_HAVE} -DHAVE_LIMITS_H=1 -DHAVE_LOCALE_H=1 -DHAVE_STDDEF_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_TIME_H=1"
+
+    # C99 standard headers, available
+    _CMAKE_HAVE="${_CMAKE_HAVE} -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1"
+    # POSIX headers, available
+    _CMAKE_HAVE="${_CMAKE_HAVE} -DHAVE_FCNTL_H=1 -DHAVE_UNISTD_H=1 -DHAVE_SYS_TIME_H=1 -DHAVE_SYS_TYPES_H=1"
+
+    if [ "${_OS}" = 'win' ]; then
+      # POSIX headers, missing
+      _CMAKE_HAVE="${_CMAKE_HAVE} -DHAVE_NETDB_H=0 -DHAVE_PWD_H=0 -DHAVE_SYSLOG_H=0 -DHAVE_ARPA_INET_H=0 -DHAVE_NETINET_IN_H=0 -DHAVE_NETINET_IP_H=0 -DHAVE_SYS_SOCKET_H=0"
+      # non-standard headers, missing
+      _CMAKE_HAVE="${_CMAKE_HAVE} -DHAVE_BYTESWAP_H=0 -DHAVE_ENDIAN_H=0 -DHAVE_SYS_ENDIAN_H=0 -DHAVE_ASM_TYPES_H=0 -DHAVE_LINUX_RTNETLINK_H=0 -DHAVE_LINUX_NETLINK_H=0"
+      # functions, available
+      _CMAKE_HAVE="${_CMAKE_HAVE} -DHAVE_LOG2=1"
+      # functions, missing
+      _CMAKE_HAVE="${_CMAKE_HAVE} -DHAVE_ACCEPT4=0 -DHAVE_BSWAP_64=0 -DHAVE_INITGROUPS=0 -DHAVE_MKOSTEMP=0"
+    fi
+
+    if [ "${_OS}" = 'mac' ]; then
+      _CMAKE_HAVE="${_CMAKE_HAVE} -DHAVE_MACH_ABSOLUTE_TIME=1"
+    else
+      _CMAKE_HAVE="${_CMAKE_HAVE} -DHAVE_MACH_ABSOLUTE_TIME=0"
+    fi
+  fi
+
   # for boringssl
   export _STRIP_BINUTILS=''
   if [ "${_OS}" = 'win' ] && [ "${_CC}" = 'llvm' ]; then
diff --git a/brotli.sh b/brotli.sh
index 5a090d5cc..86aa6640b 100755
--- a/brotli.sh
+++ b/brotli.sh
@@ -17,7 +17,7 @@ _VER="$1"
   rm -r -f "${_PKGDIR:?}" "${_BLDDIR:?}"
 
   # shellcheck disable=SC2086
-  cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} \
+  cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} ${_CMAKE_HAVE} \
     '-DBUILD_SHARED_LIBS=OFF' \
     '-DBROTLI_DISABLE_TESTS=ON' \
     "-DCMAKE_C_FLAGS=${_CFLAGS_GLOBAL_CMAKE} ${_CFLAGS_GLOBAL} ${_CPPFLAGS_GLOBAL} ${_LDFLAGS_GLOBAL} ${_LIBS_GLOBAL}"
diff --git a/cares.sh b/cares.sh
index efe2510d2..0f4b23d35 100755
--- a/cares.sh
+++ b/cares.sh
@@ -17,7 +17,7 @@ _VER="$1"
   rm -r -f "${_PKGDIR:?}" "${_BLDDIR:?}"
 
   # shellcheck disable=SC2086
-  cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} \
+  cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} ${_CMAKE_HAVE} \
     '-DCARES_STATIC=ON' \
     '-DCARES_STATIC_PIC=ON' \
     '-DCARES_SHARED=OFF' \
diff --git a/nghttp2.sh b/nghttp2.sh
index f57014eae..836ef8b91 100755
--- a/nghttp2.sh
+++ b/nghttp2.sh
@@ -23,7 +23,7 @@ _VER="$1"
   options="${options} -DOPENSSL_INCLUDE_DIR= -DLIBCARES_INCLUDE_DIR= -DLIBEV_INCLUDE_DIR= -DLIBXML2_INCLUDE_DIR="
 
   # shellcheck disable=SC2086
-  cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} ${_CMAKE_CXX_GLOBAL} ${options} \
+  cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} ${_CMAKE_CXX_GLOBAL} ${_CMAKE_HAVE} ${options} \
     '-DENABLE_LIB_ONLY=ON' \
     '-DENABLE_STATIC_LIB=ON' \
     '-DENABLE_SHARED_LIB=OFF' \
diff --git a/nghttp3.sh b/nghttp3.sh
index b9c191026..20cbef189 100755
--- a/nghttp3.sh
+++ b/nghttp3.sh
@@ -19,7 +19,7 @@ _VER="$1"
   CPPFLAGS='-DNDEBUG'
 
   # shellcheck disable=SC2086
-  cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} ${_CMAKE_CXX_GLOBAL} \
+  cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} ${_CMAKE_CXX_GLOBAL} ${_CMAKE_HAVE} \
     '-DENABLE_LIB_ONLY=ON' \
     '-DENABLE_STATIC_LIB=ON' \
     '-DENABLE_SHARED_LIB=OFF' \
diff --git a/ngtcp2.sh b/ngtcp2.sh
index 49223215f..c6599ec5a 100755
--- a/ngtcp2.sh
+++ b/ngtcp2.sh
@@ -55,7 +55,7 @@ _VER="$1"
   fi
 
   # shellcheck disable=SC2086
-  cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} ${_CMAKE_CXX_GLOBAL} ${options} \
+  cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} ${_CMAKE_CXX_GLOBAL} ${_CMAKE_HAVE} ${options} \
     '-DENABLE_STATIC_LIB=ON' \
     '-DENABLE_SHARED_LIB=OFF' \
     "-DCMAKE_C_FLAGS=${_CFLAGS_GLOBAL_CMAKE} ${_CFLAGS_GLOBAL} ${_CPPFLAGS_GLOBAL} ${CPPFLAGS} ${_LDFLAGS_GLOBAL} ${LDFLAGS} ${_LIBS_GLOBAL} ${LIBS}" \
diff --git a/zstd.sh b/zstd.sh
index 52e93b013..24730476f 100755
--- a/zstd.sh
+++ b/zstd.sh
@@ -17,7 +17,7 @@ _VER="$1"
   rm -r -f "${_PKGDIR:?}" "${_BLDDIR:?}"
 
   # shellcheck disable=SC2086
-  cmake build/cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} ${_CMAKE_CXX_GLOBAL} \
+  cmake build/cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} ${_CMAKE_CXX_GLOBAL} ${_CMAKE_HAVE} \
     '-DZSTD_BUILD_CONTRIB=OFF' \
     '-DZSTD_BUILD_TESTS=OFF' \
     '-DZSTD_LEGACY_SUPPORT=OFF' \