From a021b5e09fed671195c0a8faf3b13d83a699dc9f Mon Sep 17 00:00:00 2001
From: Joerg Bornemann <joerg.bornemann@qt.io>
Date: Tue, 23 Aug 2022 09:47:08 +0200
Subject: [PATCH] CMake: Don't write QMAKE_PRL_BUILD_DIR to Qt's .prl files

Having the build directory encoded in installed files impedes
reproducible builds.

QMAKE_PRL_BUILD_DIR is exclusively used by qmake if 'depend_prl' or
'fast_depend_prl' is active.  This is useful for tracking the
interdependencies of libraries within a project but not for Qt's installed
libraries.  Even the qmake-based Qt build never used this feature.

Fixes: QTBUG-97386
Change-Id: Icd0801edc1ad92a99fff3a1e92b5f660914813b2
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
---
 cmake/QtPrlHelpers.cmake | 1 -
 1 file changed, 1 deletion(-)

diff --git a/cmake/QtPrlHelpers.cmake b/cmake/QtPrlHelpers.cmake
index 68e413ee8c1..45bfaedcdf6 100644
--- a/cmake/QtPrlHelpers.cmake
+++ b/cmake/QtPrlHelpers.cmake
@@ -108,7 +108,6 @@ function(qt_generate_prl_file target install_dir)
     # whose names we know, and can be used in add_custom_command.
     set(prl_step1_content
         "RCC_OBJECTS = ${rcc_objects}
-QMAKE_PRL_BUILD_DIR = ${CMAKE_CURRENT_BINARY_DIR}
 QMAKE_PRL_TARGET = $<TARGET_LINKER_FILE_NAME:${target}>
 QMAKE_PRL_TARGET_PATH_FOR_CMAKE = $<TARGET_LINKER_FILE:${target}>
 QMAKE_PRL_CONFIG = ${prl_config}