From cf8b0b8f931ab13404d89c76a03f7999b0597510 Mon Sep 17 00:00:00 2001
From: Mike Pilgrem <mpilgrem@users.noreply.github.com>
Date: Sun, 17 Dec 2023 22:10:19 +0000
Subject: [PATCH] Fix #9534 Add constructor `PPC64LE` to type `Arch`, for
 powerpc64le

Also makes consequent changes.
---
 Cabal-syntax/src/Distribution/System.hs       | 10 +++++++---
 Cabal/src/Distribution/Simple/GHC/Internal.hs |  1 +
 Cabal/src/Distribution/Simple/PreProcess.hs   |  1 +
 changelog.d/issue-9534                        | 11 +++++++++++
 4 files changed, 20 insertions(+), 3 deletions(-)
 create mode 100644 changelog.d/issue-9534

diff --git a/Cabal-syntax/src/Distribution/System.hs b/Cabal-syntax/src/Distribution/System.hs
index b15d8e388e7..e1e75aa2315 100644
--- a/Cabal-syntax/src/Distribution/System.hs
+++ b/Cabal-syntax/src/Distribution/System.hs
@@ -181,13 +181,14 @@ buildOS = classifyOS Permissive System.Info.os
 
 -- ------------------------------------------------------------
 
--- | These are the known Arches: I386, X86_64, PPC, PPC64, Sparc,
+-- | These are the known Arches: I386, X86_64, PPC, PPC64, PPC64LE, Sparc,
 -- Sparc64, Arm, AArch64, Mips, SH, IA64, S390, S390X, Alpha, Hppa,
 -- Rs6000, M68k, Vax, RISCV64, LoongArch64, JavaScript and Wasm32.
 --
 -- The following aliases can also be used:
 --    * PPC alias: powerpc
---    * PPC64 alias : powerpc64, powerpc64le
+--    * PPC64 alias : powerpc64
+--    * PPC64LE alias : powerpc64le
 --    * Mips aliases: mipsel, mipseb
 --    * Arm aliases: armeb, armel
 --    * AArch64 aliases: arm64
@@ -196,6 +197,7 @@ data Arch
   | X86_64
   | PPC
   | PPC64
+  | PPC64LE
   | Sparc
   | Sparc64
   | Arm
@@ -227,6 +229,7 @@ knownArches =
   , X86_64
   , PPC
   , PPC64
+  , PPC64LE
   , Sparc
   , Sparc64
   , Arm
@@ -251,7 +254,8 @@ archAliases :: ClassificationStrictness -> Arch -> [String]
 archAliases Strict _ = []
 archAliases Compat _ = []
 archAliases _ PPC = ["powerpc"]
-archAliases _ PPC64 = ["powerpc64", "powerpc64le"]
+archAliases _ PPC64 = ["powerpc64"]
+archAliases _ PPC64LE = ["powerpc64le"]
 archAliases _ Mips = ["mipsel", "mipseb"]
 archAliases _ Arm = ["armeb", "armel"]
 archAliases _ AArch64 = ["arm64"]
diff --git a/Cabal/src/Distribution/Simple/GHC/Internal.hs b/Cabal/src/Distribution/Simple/GHC/Internal.hs
index 322a227adfd..f02c77ca298 100644
--- a/Cabal/src/Distribution/Simple/GHC/Internal.hs
+++ b/Cabal/src/Distribution/Simple/GHC/Internal.hs
@@ -779,6 +779,7 @@ profDetailLevelFlag forLib mpl =
 ghcArchString :: Arch -> String
 ghcArchString PPC = "powerpc"
 ghcArchString PPC64 = "powerpc64"
+ghcArchString PPC64LE = "powerpc64le"
 ghcArchString other = prettyShow other
 
 -- | GHC's rendering of its host or target 'OS' as used in its platform
diff --git a/Cabal/src/Distribution/Simple/PreProcess.hs b/Cabal/src/Distribution/Simple/PreProcess.hs
index 886ba7e7fd6..ee0db0b88ba 100644
--- a/Cabal/src/Distribution/Simple/PreProcess.hs
+++ b/Cabal/src/Distribution/Simple/PreProcess.hs
@@ -849,6 +849,7 @@ platformDefines lbi =
       X86_64 -> ["x86_64"]
       PPC -> ["powerpc"]
       PPC64 -> ["powerpc64"]
+      PPC64LE -> ["powerpc64le"]
       Sparc -> ["sparc"]
       Sparc64 -> ["sparc64"]
       Arm -> ["arm"]
diff --git a/changelog.d/issue-9534 b/changelog.d/issue-9534
new file mode 100644
index 00000000000..61d6d70e6e3
--- /dev/null
+++ b/changelog.d/issue-9534
@@ -0,0 +1,11 @@
+synopsis: Distinguish `powerpc64le`, by adding `PPC64LE` constructor to type `Arch`
+packages: Cabal Cabal-syntax
+issues: #9534
+
+description: {
+
+Adds constructor `PPC64LE` to type `Arch` to distinguish architecture
+powerpc64le from powerpc64. Existing constructor `PPC64` now exclusively
+represents powerpc64.
+
+}